Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
9,378
Country Rank
47
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/11499.png)
![Greece](/flags/gr.png)
![Sofia Androudi](https://cdn.adscientificindex.com/pictures/38/1846607.jpg)
Ophthalmology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,906
45,928
0.902
* Total Citation Counts Rankings
World Rank
30,479
Country Rank
10
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Todor Popov](https://cdn.adscientificindex.com/pictures/1c/1396904.jpg)
allergology
asthma
COPD
clinical immunology
urticaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,950
8,963
0.374
* Total Citation Counts Rankings
World Rank
30,233
Country Rank
13,826
Institution Rank : 304
![](https://cdn.adscientificindex.com/logos/11200.jpg)
![United States](/flags/us.png)
![Sofia D Merajver](https://cdn.adscientificindex.com/pictures/2f/1294117.jpg)
Aggressive Breast cancer
Metastases
Cancer Metabolism
Systems Biology
Global Cancer Health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,080
7,861
0.326
* Total Citation Counts Rankings
World Rank
45,340
Country Rank
16
Institution Rank : 2
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Sena Karachanak-Yankova](/user/assets/images/profile/no-profile-photo.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,025
12,061
0.669
* Total Citation Counts Rankings
World Rank
91,354
Country Rank
28
Institution Rank : 3
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Irini Doytchinova](https://cdn.adscientificindex.com/pictures/4c/1391685.jpg)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,426
5,915
0.567
* Total Citation Counts Rankings
World Rank
106,982
Country Rank
614
Institution Rank : 42
![](https://cdn.adscientificindex.com/logos/10938.jpg)
![Greece](/flags/gr.png)
![Sofia Agelaki](/user/assets/images/profile/no-profile-photo.png)
Liquid biopsy
Circulating tumor cells
circulating biomarkers
lung cancer
breast cancer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,081
4,911
0.541
* Total Citation Counts Rankings
World Rank
116,126
Country Rank
41
Institution Rank : 14
![](https://cdn.adscientificindex.com/logos/8217.jpg)
![Bulgaria](/flags/bg.png)
![Василий Голцев](https://cdn.adscientificindex.com/pictures/23/1382627.jpg)
биофизика
стрес и адаптация при растенията
математично моделиране
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,451
5,651
0.669
* Total Citation Counts Rankings
World Rank
129,098
Country Rank
44
Institution Rank : 4
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Irena Kostova](https://cdn.adscientificindex.com/pictures/a4/1390337.jpg)
coordination chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,680
2,885
0.376
* Total Citation Counts Rankings
World Rank
197,206
Country Rank
71,404
Institution Rank : 94
![](https://cdn.adscientificindex.com/logos/5618.png)
![United States](/flags/us.png)
![Paula Sofia Ramos](https://cdn.adscientificindex.com/pictures/86/1389618.jpg)
Human genetics
rheumatology
inequities
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,067
2,094
0.413
* Total Citation Counts Rankings
World Rank
223,546
Country Rank
1,657
Institution Rank : 9
![](https://cdn.adscientificindex.com/logos/11279.png)
![Greece](/flags/gr.png)
![Zyga Sofia Ziga Sophia Ziga](https://cdn.adscientificindex.com/pictures/93/1848176.jpg)
Nursing
Education
Haemodialysis
Quality of Life
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,440
3,333
0.751
* Total Citation Counts Rankings
World Rank
223,761
Country Rank
84
Institution Rank : 5
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Georgi Momekov](https://cdn.adscientificindex.com/pictures/97/1400299.jpg)
Anticancer agents
Phytopharmacology
Multidrug resistance
Drug interactions
Antimicrobials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,436
2,049
0.462
* Total Citation Counts Rankings
World Rank
239,047
Country Rank
92
Institution Rank : 6
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Zdravko Kamenov](/user/assets/images/profile/no-profile-photo.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,131
2,359
0.571
* Total Citation Counts Rankings
World Rank
248,261
Country Rank
98
Institution Rank : 7
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Boris Tenchov](/user/assets/images/profile/no-profile-photo.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,967
835
0.210
* Total Citation Counts Rankings
World Rank
257,751
Country Rank
89,330
Institution Rank : 1,006
![](https://cdn.adscientificindex.com/logos/12060.jpg)
![United States](/flags/us.png)
![Sofia Fertuzinhos](/user/assets/images/profile/no-profile-photo.png)
Neurosciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,802
1,863
0.490
* Total Citation Counts Rankings
World Rank
370,483
Country Rank
3,041
Institution Rank : 721
![](https://cdn.adscientificindex.com/logos/6065.png)
![Greece](/flags/gr.png)
![Sofia Gourtsoyianni](/user/assets/images/profile/no-profile-photo.png)
Radiology
Oncologic Imaging
Gastrointestinal and Abdominal Imaging
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,452
1,477
0.602
* Total Citation Counts Rankings
World Rank
370,903
Country Rank
3,046
Institution Rank : 722
![](https://cdn.adscientificindex.com/logos/6065.png)
![Greece](/flags/gr.png)
![Sofia Tseleni Balafouta](/user/assets/images/profile/no-profile-photo.png)
Endocrine pathology
thyroid tumors
oncology
fine needle aspiration
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,449
807
0.330
* Total Citation Counts Rankings
World Rank
373,250
Country Rank
3,066
Institution Rank : 726
![](https://cdn.adscientificindex.com/logos/6065.png)
![Greece](/flags/gr.png)
![Venetia Sofia Velonaki Venetia Velonakis](https://cdn.adscientificindex.com/pictures/9a/1847794.jpg)
bioethics
medical law
vulnerable populations
health care access
nursing education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,429
1,154
0.475
* Total Citation Counts Rankings
World Rank
375,882
Country Rank
185
Institution Rank : 8
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Nikolai Lazarov](https://cdn.adscientificindex.com/pictures/7b/919305.jpg)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,407
1,056
0.439
* Total Citation Counts Rankings
World Rank
426,970
Country Rank
3,557
Institution Rank : 160
![](https://cdn.adscientificindex.com/logos/11087.jpg)
![Greece](/flags/gr.png)
![Sofia Markoula](https://cdn.adscientificindex.com/pictures/17/1846617.jpg)
epilepsy
stroke
genetics
EEG
pharmacogenetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,029
985
0.485
* Total Citation Counts Rankings
World Rank
434,949
Country Rank
247
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/11203.png)
![Bulgaria](/flags/bg.png)
![Stoyan Groudev](/user/assets/images/profile/no-profile-photo.png)
Biohydrometallurgy
Bioremediation
Microbiology
Biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,978
335
0.169
* Total Citation Counts Rankings
World Rank
439,998
Country Rank
3,683
Institution Rank : 829
![](https://cdn.adscientificindex.com/logos/6065.png)
![Greece](/flags/gr.png)
![Sofia Chatziioannou](/user/assets/images/profile/no-profile-photo.png)
nuclear medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,946
820
0.421
* Total Citation Counts Rankings
World Rank
444,423
Country Rank
257
Institution Rank : 9
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Elena Kinova](/user/assets/images/profile/no-profile-photo.png)
Cardiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,918
1,883
0.982
* Total Citation Counts Rankings
World Rank
444,870
Country Rank
258
Institution Rank : 10
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Georgi Onchev](https://cdn.adscientificindex.com/pictures/94/1389689.jpg)
culture
psychopathology
psychosis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,916
831
0.434
* Total Citation Counts Rankings
World Rank
463,825
Country Rank
273
Institution Rank : 11
![](https://cdn.adscientificindex.com/logos/5625.jpg)
![Bulgaria](/flags/bg.png)
![Alexander Shinkov](https://cdn.adscientificindex.com/pictures/6a/1389760.jpg)
Endocrinology
Thyroid
Parathyroid
Metabolic bone disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,806
1,024
0.567
* Total Citation Counts Rankings
World Rank
460,143
Country Rank
17,635
Institution Rank : 1,323
![](https://cdn.adscientificindex.com/logos/5598.png)
![Canada](/flags/ca.png)
![Sofia Waissbluth](https://cdn.adscientificindex.com/pictures/2c/660284.jpg)
Otolaryngology
otology
neurotology
hearing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,827
1,467
0.803
* Total Citation Counts Rankings
World Ranking
9,378
Country Ranking
47
Institution Ranking
1
Sofia Androudi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,906
45,928
0.902
* Total Citation Counts Rankings
World Ranking
30,479
Country Ranking
10
Institution Ranking
1
Todor Popov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,950
8,963
0.374
![](https://cdn.adscientificindex.com/logos/5625.jpg)
allergology
asthma
COPD
clinical immunology
urticaria
* Total Citation Counts Rankings
World Ranking
30,233
Country Ranking
13,826
Institution Ranking
304
Sofia D Merajver
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,080
7,861
0.326
![](https://cdn.adscientificindex.com/logos/11200.jpg)
Aggressive Breast cancer
Metastases
Cancer Metabolism
Systems Biology
Global Cancer Health
* Total Citation Counts Rankings
World Ranking
45,340
Country Ranking
16
Institution Ranking
2
Sena Karachanak-Yankova
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,025
12,061
0.669
* Total Citation Counts Rankings
World Ranking
91,354
Country Ranking
28
Institution Ranking
3
Irini Doytchinova
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,426
5,915
0.567
* Total Citation Counts Rankings
World Ranking
106,982
Country Ranking
614
Institution Ranking
42
Sofia Agelaki
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,081
4,911
0.541
![](https://cdn.adscientificindex.com/logos/10938.jpg)
Liquid biopsy
Circulating tumor cells
circulating biomarkers
lung cancer
breast cancer
* Total Citation Counts Rankings
World Ranking
116,126
Country Ranking
41
Institution Ranking
14
Василий Голцев
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,451
5,651
0.669
![](https://cdn.adscientificindex.com/logos/8217.jpg)
биофизика
стрес и адаптация при растенията
математично моделиране
* Total Citation Counts Rankings
World Ranking
129,098
Country Ranking
44
Institution Ranking
4
Irena Kostova
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,680
2,885
0.376
![](https://cdn.adscientificindex.com/logos/5625.jpg)
coordination chemistry
* Total Citation Counts Rankings
World Ranking
197,206
Country Ranking
71,404
Institution Ranking
94
Paula Sofia Ramos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,067
2,094
0.413
![](https://cdn.adscientificindex.com/logos/5618.png)
Human genetics
rheumatology
inequities
* Total Citation Counts Rankings
World Ranking
223,546
Country Ranking
1,657
Institution Ranking
9
Zyga Sofia Ziga Sophia Ziga
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,440
3,333
0.751
![](https://cdn.adscientificindex.com/logos/11279.png)
Nursing
Education
Haemodialysis
Quality of Life
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* Total Citation Counts Rankings
World Ranking
223,761
Country Ranking
84
Institution Ranking
5
Georgi Momekov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,436
2,049
0.462
![](https://cdn.adscientificindex.com/logos/5625.jpg)
Anticancer agents
Phytopharmacology
Multidrug resistance
Drug interactions
Antimicrobials
* Total Citation Counts Rankings
World Ranking
239,047
Country Ranking
92
Institution Ranking
6
Zdravko Kamenov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,131
2,359
0.571
* Total Citation Counts Rankings
World Ranking
248,261
Country Ranking
98
Institution Ranking
7
Boris Tenchov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,967
835
0.210
* Total Citation Counts Rankings
World Ranking
257,751
Country Ranking
89,330
Institution Ranking
1,006
Sofia Fertuzinhos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,802
1,863
0.490
* Total Citation Counts Rankings
World Ranking
370,483
Country Ranking
3,041
Institution Ranking
721
Sofia Gourtsoyianni
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,452
1,477
0.602
![](https://cdn.adscientificindex.com/logos/6065.png)
Radiology
Oncologic Imaging
Gastrointestinal and Abdominal Imaging
* Total Citation Counts Rankings
World Ranking
370,903
Country Ranking
3,046
Institution Ranking
722
Sofia Tseleni Balafouta
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,449
807
0.330
![](https://cdn.adscientificindex.com/logos/6065.png)
Endocrine pathology
thyroid tumors
oncology
fine needle aspiration
* Total Citation Counts Rankings
World Ranking
373,250
Country Ranking
3,066
Institution Ranking
726
Venetia Sofia Velonaki Venetia Velonakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,429
1,154
0.475
![](https://cdn.adscientificindex.com/logos/6065.png)
bioethics
medical law
vulnerable populations
health care access
nursing education
* Total Citation Counts Rankings
World Ranking
375,882
Country Ranking
185
Institution Ranking
8
Nikolai Lazarov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,407
1,056
0.439
* Total Citation Counts Rankings
World Ranking
426,970
Country Ranking
3,557
Institution Ranking
160
Sofia Markoula
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,029
985
0.485
![](https://cdn.adscientificindex.com/logos/11087.jpg)
epilepsy
stroke
genetics
EEG
pharmacogenetics
* Total Citation Counts Rankings
World Ranking
434,949
Country Ranking
247
Institution Ranking
1
Stoyan Groudev
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,978
335
0.169
![](https://cdn.adscientificindex.com/logos/11203.png)
Biohydrometallurgy
Bioremediation
Microbiology
Biotechnology
* Total Citation Counts Rankings
World Ranking
439,998
Country Ranking
3,683
Institution Ranking
829
Sofia Chatziioannou
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,946
820
0.421
* Total Citation Counts Rankings
World Ranking
444,423
Country Ranking
257
Institution Ranking
9
Elena Kinova
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,918
1,883
0.982
* Total Citation Counts Rankings
World Ranking
444,870
Country Ranking
258
Institution Ranking
10
Georgi Onchev
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,916
831
0.434
![](https://cdn.adscientificindex.com/logos/5625.jpg)
culture
psychopathology
psychosis
* Total Citation Counts Rankings
World Ranking
463,825
Country Ranking
273
Institution Ranking
11
Alexander Shinkov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,806
1,024
0.567
![](https://cdn.adscientificindex.com/logos/5625.jpg)
Endocrinology
Thyroid
Parathyroid
Metabolic bone disease
* Total Citation Counts Rankings
World Ranking
460,143
Country Ranking
17,635
Institution Ranking
1,323
Sofia Waissbluth
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,827
1,467
0.803
![](https://cdn.adscientificindex.com/logos/5598.png)
Otolaryngology
otology
neurotology
hearing