Citation Rankings
Highly Cited Researchers

Highly Cited Researchers 435 Scientists Citation Rankings - 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.

* Total Citation Counts Rankings
Ranking Based On Selection: 1
Greece
Alkiviadis Vatopoulos
Public health microbiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,414
12,021
0.492
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Greece
Evangelos Bellos
Thermodynamics
Refrigeration
ORC
Solar Collector
Energy in Buildings
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,788
12,920
0.818
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Greece
Theodoros N Sergentanis
Epidemiology
Meta-analysis
Systematic reviews
Research methodology
Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,579
8,870
0.569
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Greece
Pantelis Nikolaidis
Kinesiology
Exercise Physiology
Exercise Testing
Sports Sciences
Sports Nutrition
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,200
11,191
0.788
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Greece
John Kaldellis
ΕΝΕΡΓΕΙΑ
ΠΕΡΙΒΑΛΛΟΝ
ΟΙΚΟΝΟΜΙΚΟΤΕΧΝΙΚΗ ΑΞΙΟΛΟΓΗΣΗ
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,730
4,623
0.363
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Greece
Theodoros Xanthos
Resuscitation
physiology
pharmacology
pathophysiology
medical educatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,122
5,227
0.431
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Greece
Nikos Maniadakis
Health Economics
Health Management
Health Policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,770
5,739
0.488
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Greece
Apostolos Beloukas
Virology
Molecular Epidemiology
Microbiology
Microbial Genomics
Infectious Diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,043
6,007
0.747
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Greece
Athanasios (Thanos) Voulodimos
Machine Learning
Artificial Intelligence
Image Analysis
Multimodal Data Fusion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,878
6,593
0.837

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* Total Citation Counts Rankings
Ranking Based On Selection: 10
Greece
Grammati Pantziou|Grammati E. Pantziou
Design of Algorithms
Parallel and Distributed Computing
Pervasive Computing
Wireless Sensor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,682
2,220
0.391
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Greece
Areti Lagiou
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,642
2,917
0.517
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Greece
Panagiotis Zoumpoulakis
Bioactive Compounds
Nutraceuticals
Novel Food
Metabolomics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,466
3,195
0.585
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Greece
Christos Troussas
Personalization Systems
Human-Machine Communication
Human-centered Artificial Intelligence
User Experience Research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,105
4,577
0.897
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Greece
Ioannis Sarris
Fluid Mechanics and Magnetohydrodynamics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,052
4,032
0.798
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Greece
Anastasios Dounis
Computational Intelligence
Machine Learning
Medical Diagnosis
Intelligent Control
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,004
2,193
0.438
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Greece
Adonis Bogris|Antonis Bogris
optical communications
optical sensors
neuromorphic photonics
photonic integrated circuits
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,826
1,644
0.341
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Greece
Ioannis Kandarakis
Medical Physics
Radiation Physics
Biomedical
Materials
Luminescence
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,930
1,152
0.293
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Greece
Emilia Kondili
Process Systems Engineering
Optimisation of industrial
energy and environmental systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,911
1,030
0.263
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Greece
John Or Ioannis Tsaknis
Food Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,777
1,338
0.354
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Greece
Georgina Tzanakaki
Public Health Microbiology
bacterial meningitis
molecular epidemiology
molecular microbiology
Vaccine Preventable Diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,696
1,031
0.279
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Greece
Cleo Sgouropoulou
Software Engineering
Learning Technologies
Intelligent and Adaptive e-Learning Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,691
3,385
0.917
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Greece
Akrivi Krouska
Artificial Intelligence Systems
Multimedia Applications
Adaptive Software
VR/AR Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,534
3,402
0.963
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Greece
Sinanoglou J Vassilia
Analytical Chemistry
Bioactive compounds
Food Image Analysis
Instrumental Analysis
Chemometrics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,497
1,824
0.522
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Greece
Dionisis Kandris
Wireless Sensor Networks
Automatic Control Systems
Industrial Automation Systems
Energy Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,287
2,505
0.762
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Greece
Dimos Triantis
University of West Attica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,262
1,478
0.453
* Total Citation Counts Rankings
Rankings
32,092
Greece
135
1
Ranking Based On Selection: 1
Alkiviadis Vatopoulos
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,414
12,021
0.492
* Total Citation Counts Rankings
Rankings
58,524
Greece
270
2
Ranking Based On Selection: 2
Evangelos Bellos
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,788
12,920
0.818
Thermodynamics
Refrigeration
ORC
Solar Collector
Energy in Buildings
* Total Citation Counts Rankings
Rankings
59,622
Greece
276
3
Ranking Based On Selection: 3
Theodoros N Sergentanis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,579
8,870
0.569
Epidemiology
Meta-analysis
Systematic reviews
Research methodology
Biostatistics
* Total Citation Counts Rankings
Rankings
67,337
Greece
323
4
Ranking Based On Selection: 4
Pantelis Nikolaidis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,200
11,191
0.788
Kinesiology
Exercise Physiology
Exercise Testing
Sports Sciences
Sports Nutrition
* Total Citation Counts Rankings
Rankings
77,203
Greece
381
5
Ranking Based On Selection: 5
John Kaldellis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,730
4,623
0.363
ΕΝΕΡΓΕΙΑ
ΠΕΡΙΒΑΛΛΟΝ
ΟΙΚΟΝΟΜΙΚΟΤΕΧΝΙΚΗ ΑΞΙΟΛΟΓΗΣΗ
* Total Citation Counts Rankings
Rankings
83,294
Greece
423
6
Ranking Based On Selection: 6
Theodoros Xanthos
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,122
5,227
0.431
Resuscitation
physiology
pharmacology
pathophysiology
medical educatio
* Total Citation Counts Rankings
Rankings
84,945
Greece
432
7
Ranking Based On Selection: 7
Nikos Maniadakis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,770
5,739
0.488
Health Economics
Health Management
Health Policy
* Total Citation Counts Rankings
Rankings
131,504
Greece
786
8
Ranking Based On Selection: 8
Apostolos Beloukas
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,043
6,007
0.747
Virology
Molecular Epidemiology
Microbiology
Microbial Genomics
Infectious Diseases
* Total Citation Counts Rankings
Rankings
134,499
Greece
819
9
Ranking Based On Selection: 9
Athanasios (Thanos) Voulodimos
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,878
6,593
0.837
Machine Learning
Artificial Intelligence
Image Analysis
Multimodal Data Fusion
* Total Citation Counts Rankings
Rankings
188,564
Greece
1,297
10
Ranking Based On Selection: 10
Grammati Pantziou|Grammati E. Pantziou
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,682
2,220
0.391
Design of Algorithms
Parallel and Distributed Computing
Pervasive Computing
Wireless Sensor

Is Your University Ready for the Future?

Compare your institution’s global, national, and city-level ranking with its 20 closest competitors and set strategic goals.
Gain insights from detailed performance analyses of scientists across 13 major disciplines, identify your strengths, improve weaknesses, and gain a competitive edge.. Check Your Free Sample Performance Analysis

* Total Citation Counts Rankings
Rankings
189,879
Greece
1,309
11
Ranking Based On Selection: 11
Areti Lagiou
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,642
2,917
0.517
* Total Citation Counts Rankings
Rankings
195,857
Greece
1,365
12
Ranking Based On Selection: 12
Panagiotis Zoumpoulakis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,466
3,195
0.585
* Total Citation Counts Rankings
Rankings
209,315
Greece
1,479
13
Ranking Based On Selection: 13
Christos Troussas
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,105
4,577
0.897
Personalization Systems
Human-Machine Communication
Human-centered Artificial Intelligence
User Experience Research
* Total Citation Counts Rankings
Rankings
211,496
Greece
1,501
14
Ranking Based On Selection: 14
Ioannis Sarris
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,052
4,032
0.798
* Total Citation Counts Rankings
Rankings
213,451
Greece
1,516
15
Ranking Based On Selection: 15
Anastasios Dounis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,004
2,193
0.438
Computational Intelligence
Machine Learning
Medical Diagnosis
Intelligent Control
* Total Citation Counts Rankings
Rankings
220,965
Greece
1,585
16
Ranking Based On Selection: 16
Adonis Bogris|Antonis Bogris
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,826
1,644
0.341
optical communications
optical sensors
neuromorphic photonics
photonic integrated circuits
* Total Citation Counts Rankings
Rankings
266,851
Greece
2,027
17
Ranking Based On Selection: 17
Ioannis Kandarakis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,930
1,152
0.293
Medical Physics
Radiation Physics
Biomedical
Materials
Luminescence
* Total Citation Counts Rankings
Rankings
267,986
Greece
2,040
18
Ranking Based On Selection: 18
Emilia Kondili
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,911
1,030
0.263
Process Systems Engineering
Optimisation of industrial
energy and environmental systems
* Total Citation Counts Rankings
Rankings
276,189
Greece
2,108
19
Ranking Based On Selection: 19
John Or Ioannis Tsaknis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,777
1,338
0.354
* Total Citation Counts Rankings
Rankings
281,429
Greece
2,157
20
Ranking Based On Selection: 20
Georgina Tzanakaki
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,696
1,031
0.279
Public Health Microbiology
bacterial meningitis
molecular epidemiology
molecular microbiology
Vaccine Preventable Diseases
* Total Citation Counts Rankings
Rankings
281,715
Greece
2,161
21
Ranking Based On Selection: 21
Cleo Sgouropoulou
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,691
3,385
0.917
Software Engineering
Learning Technologies
Intelligent and Adaptive e-Learning Systems
* Total Citation Counts Rankings
Rankings
292,448
Greece
2,262
22
Ranking Based On Selection: 22
Akrivi Krouska
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,534
3,402
0.963
Artificial Intelligence Systems
Multimedia Applications
Adaptive Software
VR/AR Systems
* Total Citation Counts Rankings
Rankings
295,091
Greece
2,281
23
Ranking Based On Selection: 23
Sinanoglou J Vassilia
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,497
1,824
0.522
Analytical Chemistry
Bioactive compounds
Food Image Analysis
Instrumental Analysis
Chemometrics
* Total Citation Counts Rankings
Rankings
310,879
Greece
2,418
24
Ranking Based On Selection: 24
Dionisis Kandris
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,287
2,505
0.762
Wireless Sensor Networks
Automatic Control Systems
Industrial Automation Systems
Energy Systems
* Total Citation Counts Rankings
Rankings
312,978
Greece
2,445
25
Ranking Based On Selection: 25
Dimos Triantis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,262
1,478
0.453