Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 256 Scientists Citation Rankings (Sort by last 6 years Citation Index) - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 1
Automatic Control
Optimisation
Transportation
Water System
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,842
11,028
0.346
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* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 2
Operations research
decision analysis
financ
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,476
8,331
0.340
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 3
bioremediation
phytoremediation
environmental engineering
environmental biotechnolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,609
7,386
0.358
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 4
Computer vision
Machine learning
Optimization
Genetic algorithms
Semi-supervised learnin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,765
6,891
0.887
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 5
security
systems
hardware
metasurface
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,047
6,763
0.561
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,666
6,008
0.515
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 7
Energy efficiency
built environment
energy managemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,991
5,803
0.528
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 8
waste-to-energy
waste-to-materials
circular economy
zero waste
contaminated site
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,923
5,540
0.699
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 9
Banking
Financial Institutions
Financial Intermediation
Financial Regulation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,468
5,478
0.439
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* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 10
Operations Reserarch
Decision analysis
Business Analytics
Financ
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,855
5,163
0.373
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 11
Sustainability assessment
Sustainable energy
Mobility
Insularity
Greening heritag
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,127
4,700
0.515
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 12
Hydrometallurgy
earth sciences
materials
waste valorization
soil and water remediatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,285
4,211
0.508
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 13
Water and wastewater treatment
Waste valorisatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,369
4,144
0.400
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 14
Bioinformatics
EEG analysis
Image Processing
Signal Processin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,038
4,174
0.462
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 15
Automatic control and optimization theory and applications to traffic and transportation system
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,365
4,115
0.492
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 16
water and wastewater management
constructed wetlands
nature-based solutions
circular economy
ecological engineerin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,244
4,140
0.789
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 17
Environmental Engineering
Geochemistry
Hydrolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,747
3,840
0.439
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 18
Heterogeneous Catalysis
Nanocatalysis
Size/Shape Engineering
Direct Carbon Fuel Cells
CO2 hydrogenatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,763
3,540
0.614
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 19
Environmental Analytical Chemistry
Microextraction
Environmental Organic Chemistry
Supramolecular Chemistr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,378
3,506
0.338
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 20
Heterogeneous catalysi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,091
3,337
0.471
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 21
Nanocatalysis
Solid oxide fuel cells
CO2 hydrogenation
Dry reforming of methane
Air pollutio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,575
3,300
0.436
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 22
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,703
3,126
0.466
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 23
Hydrology
Groundwater Models
Optimal Groundwater Management
Flood Modelin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,518
3,085
0.559
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 24
Contaminant transport in environmental system
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,553
2,971
0.393
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 25
Environmental Engineering
Environmental Sustainability
Life Cycle Assessment
Carbon dioxide remo
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,735
2,894
0.775
* Last 6 Years Citation Counts Rankings
Rankings
30,885
153
1
Ranking Based On Selection: 1
Markos Papageorgiou
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,842
11,028
0.346
Automatic Control
Optimisation
Transportation
Water System
* Last 6 Years Citation Counts Rankings
Rankings
46,451
228
2
Ranking Based On Selection: 2
Constantin Zopounidis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,476
8,331
0.340
Operations research
decision analysis
financ
* Last 6 Years Citation Counts Rankings
Rankings
55,130
271
3
Ranking Based On Selection: 3
Nicolas Kalogerakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,609
7,386
0.358
bioremediation
phytoremediation
environmental engineering
environmental biotechnolog
* Last 6 Years Citation Counts Rankings
Rankings
60,741
302
4
Ranking Based On Selection: 4
Eftychios Protopapadakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,765
6,891
0.887
Computer vision
Machine learning
Optimization
Genetic algorithms
Semi-supervised learnin
* Last 6 Years Citation Counts Rankings
Rankings
62,274
306
5
Ranking Based On Selection: 5
Sotiris Ioannidis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,047
6,763
0.561
security
systems
hardware
metasurface
* Last 6 Years Citation Counts Rankings
Rankings
73,248
364
6
Ranking Based On Selection: 6
Evangelos Grigoroudis|Ευάγγελος Γρηγορούδης
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,666
6,008
0.515
* Last 6 Years Citation Counts Rankings
Rankings
76,704
387
7
Ranking Based On Selection: 7
Denia Kolokotsa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,991
5,803
0.528
* Last 6 Years Citation Counts Rankings
Rankings
81,456
410
8
Ranking Based On Selection: 8
Apostolos Giannis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,923
5,540
0.699
waste-to-energy
waste-to-materials
circular economy
zero waste
contaminated site
* Last 6 Years Citation Counts Rankings
Rankings
82,689
415
9
Ranking Based On Selection: 9
Fotios Pasiouras
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,468
5,478
0.439
Banking
Financial Institutions
Financial Intermediation
Financial Regulation
* Last 6 Years Citation Counts Rankings
Rankings
89,237
466
10
Ranking Based On Selection: 10
Michalis Doumpos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,855
5,163
0.373
Operations Reserarch
Decision analysis
Business Analytics
Financ
Smart Institutional Plan
Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.
* Last 6 Years Citation Counts Rankings
Rankings
100,677
554
11
Ranking Based On Selection: 11
Theocharis Tsoutsos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,127
4,700
0.515
Sustainability assessment
Sustainable energy
Mobility
Insularity
Greening heritag
* Last 6 Years Citation Counts Rankings
Rankings
115,061
645
12
Ranking Based On Selection: 12
Kostas Komnitsas
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,285
4,211
0.508
Hydrometallurgy
earth sciences
materials
waste valorization
soil and water remediatio
* Last 6 Years Citation Counts Rankings
Rankings
117,259
667
14
Ranking Based On Selection: 13
Evan Diamadopoulos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,369
4,144
0.400
Water and wastewater treatment
Waste valorisatio
* Last 6 Years Citation Counts Rankings
Rankings
116,289
656
13
Ranking Based On Selection: 14
Michalis Zervakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,038
4,174
0.462
Bioinformatics
EEG analysis
Image Processing
Signal Processin
* Last 6 Years Citation Counts Rankings
Rankings
118,209
675
16
Ranking Based On Selection: 15
Ioannis Papamichail
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,365
4,115
0.492
Automatic control and optimization theory and applications to traffic and transportation system
* Last 6 Years Citation Counts Rankings
Rankings
117,407
668
15
Ranking Based On Selection: 16
Alexandros I Stefanakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,244
4,140
0.789
water and wastewater management
constructed wetlands
nature-based solutions
circular economy
ecological engineerin
* Last 6 Years Citation Counts Rankings
Rankings
128,470
746
17
Ranking Based On Selection: 17
Nikolaos P. Nikolaidis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,747
3,840
0.439
Environmental Engineering
Geochemistry
Hydrolog
* Last 6 Years Citation Counts Rankings
Rankings
141,394
817
18
Ranking Based On Selection: 18
Michalis Konsolakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,763
3,540
0.614
Heterogeneous Catalysis
Nanocatalysis
Size/Shape Engineering
Direct Carbon Fuel Cells
CO2 hydrogenatio
* Last 6 Years Citation Counts Rankings
Rankings
142,983
827
19
Ranking Based On Selection: 19
E Psillakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,378
3,506
0.338
Environmental Analytical Chemistry
Microextraction
Environmental Organic Chemistry
Supramolecular Chemistr
* Last 6 Years Citation Counts Rankings
Rankings
151,323
903
20
Ranking Based On Selection: 20
Paraskevi Panagiotopoulou
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,091
3,337
0.471
* Last 6 Years Citation Counts Rankings
Rankings
153,302
921
21
Ranking Based On Selection: 21
Ioannis V Yentekakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,575
3,300
0.436
Nanocatalysis
Solid oxide fuel cells
CO2 hydrogenation
Dry reforming of methane
Air pollutio
* Last 6 Years Citation Counts Rankings
Rankings
163,120
992
22
Ranking Based On Selection: 22
Evangelos Gidarakos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,703
3,126
0.466
* Last 6 Years Citation Counts Rankings
Rankings
165,535
1,017
23
Ranking Based On Selection: 23
George P Karatzas
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,518
3,085
0.559
Hydrology
Groundwater Models
Optimal Groundwater Management
Flood Modelin
* Last 6 Years Citation Counts Rankings
Rankings
172,713
1,080
24
Ranking Based On Selection: 24
Constantinos V Chrysikopoulos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,553
2,971
0.393
Contaminant transport in environmental system
* Last 6 Years Citation Counts Rankings
Rankings
177,698
1,114
25
Ranking Based On Selection: 25
Spyros Foteinis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,735
2,894
0.775
Environmental Engineering
Environmental Sustainability
Life Cycle Assessment
Carbon dioxide remo