University, Subject, Country, Region, World

University of Johannesburg Scientist Rankings 2023

AD Scientific Index analyzes academic studies from 1 countries, 1 universities/institutions, and 806 scientists by using numerous criteria to present results to be used for the evaluation of productivity and efficiency by individuals and institutions. In addition to sorting by the “total H-index” you can find here, you can examine several rankings and analyses by the "last 6 years H-index", "total i10 index", "last 6 years' i10 index", "total number of citations", and “last 6 years’ citations”. Please read the methodology section for “Limitations and Possible Reasons Why a Scientist Is Not on This List”. Click for individual or institutional registration.

AD Scientific Index - World Scientist Rankings - 2023 H INDEX i10 INDEX CITATION
University / Institution Country Region World Name Country University / Institution Subject Total Last 6 year Last 6 year/total Total Last 6 year Last 6 year/total Total Last 6 year Last 6 year/total
1 2 7 937
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

HEP | LHC | ATLAS |

161 140 0.870 584 581 0.995 99567 75636 0.760
2 9 19 4601
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

Nuclear Physics | Particle Physics | Diamond Physics | Quantum Physics |

109 83 0.761 294 227 0.772 58117 32084 0.552
3 50 70 18553
South Africa University of Johannesburg University of Johannesburg Social Sciences / Tourism & Hospitality

Tourism and Development | Local Economic Development | Small Enterprise Development |

75 46 0.613 428 228 0.533 20531 8282 0.403
4 77 104 28781
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

isotope geochemistry | geochronology |

65 33 0.508 151 99 0.656 26895 7377 0.274
5 80 107 29346
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

Economic Geology | Iron and manganese deposits | Precambrian geology | Sedimentology and basin analyses. |

65 41 0.631 179 135 0.754 16472 6004 0.364
6 117 169 40676
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Biological Science

Taxonomy | Ethnobotany | Medicinal plants | Apiaceae | Umbelliferae |

58 35 0.603 253 115 0.455 17009 6538 0.384
7 167 256 55499
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Mathematics

Graph Theory |

52 32 0.615 312 168 0.538 12765 5717 0.448
8 190 290 61028
South Africa University of Johannesburg University of Johannesburg Social Sciences / Political Science

political economy | political ecology | geography | social movements |

50 30 0.600 211 97 0.460 15205 4580 0.301
9 209 320 64899
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Biological Science

Photobiology | Photochemistry | Photodynamic therapy | Wound healing | Stem cells |

49 41 0.837 161 140 0.870 11103 7519 0.677
10 241 379 72540
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Computer Science

Artificial Intelligence | Machine Learning | Monte Carlo Simulation | Bayesian Statistics | Finite Element Updating |

47 30 0.638 217 102 0.470 9515 4364 0.459

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11 250 399 75093
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Mechanical Engineering

mechanical engineering | aerodynamics | renewable energy | materials |

47 25 0.532 127 49 0.386 5355 1925 0.359
12 294 477 82930
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

igneous petrology | isotope geochemistry |

45 29 0.644 100 83 0.830 6475 3157 0.488
13 310 503 86653
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Biochemistry

Biochemistry | Molecular biology | Plant-microbe interactions | Innate immunity | Metabolomics |

44 30 0.682 131 79 0.603 6917 3333 0.482
14 374 633 100976
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

Archaean geology |

41 34 0.829 104 96 0.923 7101 4316 0.608
15 377 638 101822
South Africa University of Johannesburg University of Johannesburg Social Sciences / Archeology

Stone Age archaeology | human behavioural and cognitive evolution |

41 32 0.780 84 73 0.869 6397 3090 0.483
16 381 647 103290
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Anatomy

Respiration | oxygen consumption | evolution | adaptation |

41 17 0.415 129 41 0.318 5455 1399 0.256
17 385 657 104348
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

Metamorphic Petrology | Field Geology | Tectonics | Evolution of High-Grade Terranes | Fluids |

41 17 0.415 91 50 0.549 4401 1046 0.238
18 428 743 114184
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Electrochemistry | electrochemical biosensors | electrochemical sensors | photoelectrochemistry | water treatment |

39 34 0.872 107 92 0.860 5649 4280 0.758
19 440 763 115335
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Chemical Engineering

Spark Plasma Sintering | Tribocorrosion | Nanomechanics |

39 32 0.821 122 112 0.918 5072 4056 0.800
20 538 960 134800
South Africa University of Johannesburg University of Johannesburg Education / Education

Education |

36 19 0.528 80 35 0.438 5126 1400 0.273
21 539 962 134895
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

thermal science | additive manufacturing | Atomic Layer Deposition | Cold Gas Dynamic Spraying |

36 27 0.750 120 86 0.717 5088 3176 0.624
22 545 973 136198
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Parasitology

One Health | parasitology | biology |

36 18 0.500 86 33 0.384 4583 1432 0.312
23 547 980 136736
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Electrical & Information Engineering

RF/Microwave | Terahertz Antennas | Nanophotonics | Next Generation Communication Systems | Cognitive Radio |

36 28 0.778 112 67 0.598 4409 2477 0.562
24 553 991 137405
South Africa University of Johannesburg University of Johannesburg Agriculture & Forestry / Horticulture

Postharvest Preservation🍇 | Agroprocessing💱 | Edible coatings🔘 | Circular Economy♻️ | Food 4.0🇿🇦 |

36 30 0.833 78 75 0.962 4182 3192 0.763
25 594 1094 146261
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Biological Science

molecular ecology | wildlife management | sub-Antarctic | South Africa |

35 21 0.600 71 46 0.648 3762 1761 0.468
26 599 1100 146617
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Analytical Chemistry | Natural Products | Metabolomics | Forensic chemical analysis | UPLC-QTOF MS method development and analysis |

35 25 0.714 85 72 0.847 3633 2179 0.600
27 605 1114 147331
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Food Science and Engineering

Mycotoxicology |

35 30 0.857 70 67 0.957 3100 2430 0.784
28 616 1132 149381
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Computer Science

Information Cyber Security |

34 22 0.647 79 40 0.506 5982 1818 0.304
29 620 1139 149932
South Africa University of Johannesburg University of Johannesburg Social Sciences / Housing

Building | Construction Digitalisation | Value Management | Quantity Surveying | Construction Industry Development |

34 34 1.000 143 131 0.916 5503 5175 0.940
30 621 1140 150004
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Engineering

sustainability engineering | biogas | life cycle assessment | climate change adaptation | energy efficiency |

34 30 0.882 132 102 0.773 5455 4271 0.783
31 622 1143 150066
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Optometry

Optics | Vision | Astigmatism |

34 12 0.353 114 17 0.149 5414 1064 0.197
32 624 1147 150284
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Mathematics

Mathematical Physics | Theoretical Physics | Nonlinear Dynamics | Scientific Computing | Computer Algebra |

34 13 0.382 109 19 0.174 5267 917 0.174
33 627 1155 150950
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Biological Science

Fish haematology | Ecophysiology | Ecotoxicology | Biomarkers |

34 19 0.559 87 41 0.471 4908 1491 0.304
34 635 1175 152807
South Africa University of Johannesburg University of Johannesburg Business & Management / Marketing

Industry 4.0 | Circular Economy | Sustainable Supply Chains | Business-to-Business Firms |

34 33 0.971 69 64 0.928 4263 4073 0.955
35 641 1188 153911
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

Geometallurgy | Diamonds | Kimberlites |

34 23 0.676 73 45 0.616 3948 1488 0.377
36 664 1246 158676
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Electrical & Electronic Engineering

Digital Communications | Information theory | Powerline Communications | Channel Coding |

33 22 0.667 119 50 0.420 5542 2200 0.397
37 672 1263 160466
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Civil Engineering

Industry 4.0 | Construction project management | project management | procurement |

33 29 0.879 107 85 0.794 4556 3273 0.718
38 678 1275 161379
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

Condensed matter physics |

33 21 0.636 128 61 0.477 4244 1998 0.471
39 683 1285 162314
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Transport property | Catalysis | Energy harvesting and storage |

33 20 0.606 84 53 0.631 3990 1530 0.383
40 684 1286 162367
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Nanoscience and Nanotechnology

nanotechnology |

33 29 0.879 107 91 0.850 3976 3197 0.804

 New. 2023 Country Top Lists: Top 10000, 5000, 3000, 2000, 1000. Only in AD Scientific Index

41 690 1294 163194
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Geography

Urban Geography | Economic Geography | Tourism and Sustainablity |

33 27 0.818 98 79 0.806 3762 2435 0.647
42 696 1307 163990
South Africa University of Johannesburg University of Johannesburg Biomedical technology

Laser tissue interaction | wound healing | diabetes | low level laser therapy | phototherapy |

33 26 0.788 64 57 0.891 3577 2418 0.676
43 707 1342 166118
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Environmental Remediation |

33 31 0.939 46 46 1.000 2692 2182 0.811
44 742 1408 172321
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

Petrology | Geochemistry | Geochronology | Geodynamics | Early Earth |

32 28 0.875 56 54 0.964 3793 2343 0.618
45 753 1438 174137
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Nitrogen biogeochemistry | acid deposition | palaeolimnology |

32 17 0.531 57 29 0.509 3392 1179 0.348
46 757 1443 174449
South Africa University of Johannesburg University of Johannesburg Social Sciences / International Relations

International relations | African Diplomacy and Foreign Policy | African Leadership |

32 18 0.563 73 33 0.452 3321 929 0.280
47 766 1468 175880
South Africa University of Johannesburg University of Johannesburg Social Sciences / Higher Education Studies

higher education | teaching and learning | scholarship of teaching and learning | social justice | professional development |

32 22 0.688 67 42 0.627 2981 1664 0.558
48 792 1538 181715
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Epidemiology and Public Health

Epidemiology & Public Health |

31 24 0.774 61 50 0.820 3930 2381 0.606
49 802 1560 183216
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Nanoscience and Nanotechnology

NanoMedicine | NanoBiotechnology |

31 28 0.903 60 60 1.000 3572 2850 0.798
50 811 1590 185417
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Food Science and Engineering

mycobateriology | Staphylococcus aureus | Pseudomonas aeruginosa | Endophytes | drug discovery |

31 23 0.742 58 47 0.810 3140 1968 0.627
51 814 1594 185486
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Biological Science

Marine biology | Phylogeography | Population genomics | Conservation genetics |

31 19 0.613 59 45 0.763 3127 1346 0.430
52 828 1637 187365
South Africa University of Johannesburg University of Johannesburg Social Sciences / Anthropology

Medical Anthropology |

31 18 0.581 45 30 0.667 2668 1073 0.402
53 850 1688 192750
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Chemistry | Catalysis | Robotics |

30 24 0.800 106 77 0.726 3797 2348 0.618
54 869 1731 195652
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Nanoscience and Nanotechnology

Nanoscience and Nanotechnology |

30 24 0.800 78 63 0.808 3195 2160 0.676
55 882 1762 197492
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Nanotechnology | Nanomaterials | Chemometrics | Sample preparation | Environmental Analytical Chemistry |

30 28 0.933 86 81 0.942 2884 2558 0.887

January 1, 2022 Total 716.979 scientist, 212 country, 14.130 university... January 6, 2023 Total 1.264.669 scientist, 216 country, 19.528 university

56 930 1895 205837
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Energy Engineering

Energy materials | H2&fuel cell technologies | ALD technologies | system integration |

29 27 0.931 61 52 0.852 3353 2723 0.812
57 937 1918 207161
South Africa University of Johannesburg University of Johannesburg Education / Education

educational leadership and management | financial and human resource management in education |

29 23 0.793 49 39 0.796 3119 1796 0.576
58 959 1983 210350
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

Thin Film Flow | Differential Equations | Lie Group Analysis |

29 20 0.690 76 44 0.579 2643 1356 0.513
59 977 2033 212339
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Geography

Tourism Geographies | Second Homes | Urban Tourism | Tourism | Geography |

29 21 0.724 53 49 0.925 2220 1399 0.630
60 989 2060 213576
South Africa University of Johannesburg University of Johannesburg Social Sciences / Psychology

Organisational Behaviour | Psychology assessment | Research methodology | Organisational development | Social sciences |

28 22 0.786 78 36 0.462 6453 3126 0.484
61 1003 2087 215774
South Africa University of Johannesburg University of Johannesburg Social Sciences / Anthropology

Higher education | public health | children | poverty and livelihoods |

28 18 0.643 46 25 0.543 4033 1579 0.392
62 1021 2143 219986
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

Coal geology | mineralogy | geoheritage |

28 15 0.536 45 21 0.467 2997 976 0.326
63 1052 2231 224595
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Parasitology

Fish parasitology | metal accumulation | sentinel |

28 16 0.571 82 35 0.427 2391 1010 0.422
64 1072 2304 229538
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Biochemistry

Biochemistry | Plant:microbe interactions | Innate immunity | Proteomics | Venomics |

27 24 0.889 56 46 0.821 4019 2181 0.543
65 1099 2379 233714
South Africa University of Johannesburg University of Johannesburg Social Sciences / Psychology

Globalisation | Organisational behaviour | Industrial Relations | HR | Business |

27 21 0.778 82 49 0.598 2945 1803 0.612
66 1137 2497 240209
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Food Science and Engineering

Food Chemistry | Innovative Foods | Value Addition | Food Product Development | 3D Food Printing |

27 27 1.000 48 48 1.000 2138 2054 0.961
67 1159 2575 245675
South Africa University of Johannesburg University of Johannesburg Social Sciences / Psychology

26 18 0.692 78 35 0.449 3439 1302 0.379
68 1164 2587 246527
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

Particle physics | gravitational physics | physics education |

26 16 0.615 46 26 0.565 3214 2192 0.682
69 1171 2595 247170
South Africa University of Johannesburg University of Johannesburg Social Sciences / Social Work

Social Work | Social Work Research | Social Development | Social Policy | Social Security |

26 19 0.731 65 39 0.600 3083 1560 0.506
70 1178 2617 248333
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Nursing and Midwifery

mental health promotion | psychiatric nursing | psycho-education | mental health |

26 17 0.654 73 31 0.425 2879 1176 0.408
71 1212 2708 253384
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Mathematics

graph theory | distance in graphs |

26 16 0.615 62 35 0.565 2308 983 0.426
72 1266 2886 262948
South Africa University of Johannesburg University of Johannesburg History, Philosophy, Theology / History

Social and political change | African studies | comparative labour history |

25 17 0.680 40 22 0.550 3042 1291 0.424
73 1267 2890 263162
South Africa University of Johannesburg University of Johannesburg Social Sciences / Sociology

Sociology | Sociology of sport | Urbanisation | Race and ethnic relations |

25 14 0.560 49 20 0.408 2992 905 0.302
74 1270 2903 263946
South Africa University of Johannesburg University of Johannesburg Economics & Econometrics / Accounting & Finance

evidence microfinance agriculture consumer involvement |

25 18 0.720 45 33 0.733 2846 1473 0.518
75 1276 2912 264630
South Africa University of Johannesburg University of Johannesburg Social Sciences / Psychology

25 17 0.680 68 30 0.441 2730 1146 0.420
76 1288 2942 266182
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Metallurgical & Materials Engineering

Remuneration | compensation | reward | performance management |

25 23 0.920 46 38 0.826 2536 1923 0.758
77 1299 2966 267835
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Food Science and Engineering

Food-Energy-Water Systems | Blockchain | Prescriptive Analytics | Machine Learning | Cyber-Physical Systems |

25 21 0.840 52 50 0.962 2376 2070 0.871
78 1305 2983 268490
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

Condensed matter physics at extreme conditions |

25 11 0.440 41 13 0.317 2319 525 0.226
79 1306 2984 268535
South Africa University of Johannesburg University of Johannesburg Education / Education

Critical and liberatory pedagogies | social justice | anti-racism | curriculum issues | education rights. |

25 16 0.640 59 31 0.525 2314 823 0.356
80 1318 3036 271401
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

Crustal evolution | geology |

25 13 0.520 46 20 0.435 2067 607 0.294
81 1336 3110 274499
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Geography

Ecology | biodiversity and extinction risk | invasion ecology | evolutionary diversification | Environmental Management |

25 20 0.800 46 44 0.957 1785 1368 0.766
82 1347 3145 275626
South Africa University of Johannesburg University of Johannesburg Medical and Health Sciences / Pharmacy & Pharmaceutical Sciences

Drug discovery | Smart Molecules | Natural Products |

25 19 0.760 41 37 0.902 1601 1144 0.715
83 1375 3226 282555
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

Solar irradiance | Solar Energy | Active Galactic Nuclei |

24 16 0.667 41 23 0.561 2591 904 0.349
84 1377 3230 282908
South Africa University of Johannesburg University of Johannesburg Social Sciences / Social Work

resilience | care-leaving | youth transitions | clinical social work |

24 22 0.917 51 36 0.706 2544 1833 0.721
85 1380 3234 282985
South Africa University of Johannesburg University of Johannesburg Information and Knowledge Management.

Knowledge Management | Competitive Intelligence |

24 15 0.625 54 26 0.481 2534 994 0.392
86 1381 3235 283100
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Computational Chemistry | Numerical modelling | Bioinorganic | Organic | Quantum Chemistry |

24 24 1.000 55 49 0.891 2520 2341 0.929
87 1421 3351 289901
South Africa University of Johannesburg University of Johannesburg Social Sciences / Higher Education Studies

Higher Education Policy & Management | Educational Leadership | Education Policy Evaluation |

24 15 0.625 40 23 0.575 1929 749 0.388
88 1438 3402 292198
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Chemical Sciences

Organic chemistry | organophosphorus chemistry | Water purification | Drug delivery systems | Polymeric nanocomposite materials |

24 20 0.833 38 31 0.816 1761 1317 0.748
89 1447 3454 293656
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Metallurgical & Materials Engineering

Circular economy | Green Production | natural resources beneficiation and value addition | waste-to-energy | and nuclear waste engineering science. |

24 17 0.708 46 35 0.761 1633 974 0.596
90 1488 3612 302537
South Africa University of Johannesburg University of Johannesburg Economics & Econometrics / Economics

Economics |

23 18 0.783 35 26 0.743 2359 1364 0.578

Institutional Subscription (Discount and Free Institutional Academic Performance Report)

91 1490 3619 303084
South Africa University of Johannesburg University of Johannesburg Business & Management / Human Resource Management

Human Resource Management | Talent Management | Work Wellness |

23 19 0.826 47 33 0.702 2300 1452 0.631
92 1491 3624 303396
South Africa University of Johannesburg University of Johannesburg Business & Management / Marketing

Leadership | Management | Strategy | Relationship Marketing | Customer Relationship Management |

23 22 0.957 64 43 0.672 2270 1573 0.693
93 1493 3627 303479
South Africa University of Johannesburg University of Johannesburg Social Sciences / Linguistics and Literature

orality performance and literature |

23 11 0.478 48 14 0.292 2262 531 0.235
94 1496 3632 303664
South Africa University of Johannesburg University of Johannesburg Economics & Econometrics / Economics

Competition Economics | Industrial Development | Competition Policy |

23 16 0.696 66 33 0.500 2246 1065 0.474
95 1506 3651 304789
South Africa University of Johannesburg University of Johannesburg Social Sciences / Social Work

social work | disability | culture | traditional healing |

23 16 0.696 43 25 0.581 2148 920 0.428
96 1512 3672 305574
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Electrical & Electronic Engineering

Optimisation | Automation | Artificial Intelligence | Nonlinear Dynamics |

23 23 1.000 43 39 0.907 2085 1864 0.894
97 1565 3824 312577
South Africa University of Johannesburg University of Johannesburg Education / Educational Psychology

orphans and vulnerable children | community psychology | Education and Care in Childhood | Children's rights | Social Justice |

23 18 0.783 38 28 0.737 1641 935 0.570
98 1602 4002 320525
South Africa University of Johannesburg University of Johannesburg Engineering & Technology / Earth Sciences

coal |

22 19 0.864 43 35 0.814 2727 1862 0.683
99 1632 4068 324907
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Biological Science

plant anatomy | Apiaceae | Rubiaceae | Umbelliferae | extrafloral nectaries |

22 14 0.636 65 22 0.338 2107 819 0.389
100 1640 4094 326334
South Africa University of Johannesburg University of Johannesburg Natural Sciences / Physics

22 14 0.636 62 22 0.355 1989 694 0.349