Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 209 Scientists Citation Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
allergology
asthma
COPD
clinical immunology
urticaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,734
8,303
0.336
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,729
11,656
0.591
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,351
6,294
0.554
* Total Citation Counts Rankings
Ranking Based On Selection: 4
coordination chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,031
2,781
0.346
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Anticancer agents
Phytopharmacology
Multidrug resistance
Drug interactions
Antimicrobials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,658
1,940
0.416
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,406
2,344
0.532
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,018
741
0.184
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Cardiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,688
2,646
0.984
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,531
989
0.391
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
culture
psychopathology
psychosis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,995
707
0.354
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Endocrinology
Thyroid
Parathyroid
Metabolic bone disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,909
958
0.502
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Toxicology
Drug metabolism
Hepatoprotection
Neuroprotection
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,734
1,247
0.719
* Total Citation Counts Rankings
Ranking Based On Selection: 13
pharmacognosy
phytochemistry
NMR
LC-MS
GC-MS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,639
881
0.538
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Allergy & Clinical Immunology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,420
719
0.506
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,242
382
0.308
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Gastroenterology
IBD
Endoscopy
Bile acid malabsorption
Microscopic colitis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,211
1,210
0.999
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Pollination Ecology
Plant Breeding Systems
Invasive plants
Ethnobotany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,188
808
0.680
* Total Citation Counts Rankings
Ranking Based On Selection: 18
adult stem cells
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,128
408
0.362
* Total Citation Counts Rankings
Ranking Based On Selection: 19
neurology
neurosciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,093
861
0.788
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,018
549
0.539
* Total Citation Counts Rankings
Ranking Based On Selection: 21
drug metabolism
drug toxicity
oxidative stress
drug interactions
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
938
615
0.656
* Total Citation Counts Rankings
Ranking Based On Selection: 22
endocrinology
prediabetes
diabetes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
912
596
0.654
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
834
492
0.590
* Total Citation Counts Rankings
Ranking Based On Selection: 24
natural products
saponins
flavonoids
phytochemistry
chromatography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
703
562
0.799
* Total Citation Counts Rankings
Ranking Based On Selection: 25
pharmaceutical legislation
pharmacoeconomics
HTA
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
700
439
0.627
* Total Citation Counts Rankings
Rankings
30,750
11
1
Ranking Based On Selection: 1
Todor Popov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,734
8,303
0.336
allergology
asthma
COPD
clinical immunology
urticaria
* Total Citation Counts Rankings
Rankings
42,253
13
2
Ranking Based On Selection: 2
Sena Karachanak-Yankova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,729
11,656
0.591
* Total Citation Counts Rankings
Rankings
86,749
28
3
Ranking Based On Selection: 3
Irini Doytchinova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,351
6,294
0.554
* Total Citation Counts Rankings
Rankings
128,745
45
4
Ranking Based On Selection: 4
Irena Kostova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,031
2,781
0.346
coordination chemistry
* Total Citation Counts Rankings
Rankings
223,482
82
5
Ranking Based On Selection: 5
Georgi Momekov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,658
1,940
0.416
Anticancer agents
Phytopharmacology
Multidrug resistance
Drug interactions
Antimicrobials
* Total Citation Counts Rankings
Rankings
235,329
88
6
Ranking Based On Selection: 6
Zdravko Kamenov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,406
2,344
0.532
* Total Citation Counts Rankings
Rankings
256,259
98
7
Ranking Based On Selection: 7
Boris Tenchov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,018
741
0.184
* Total Citation Counts Rankings
Rankings
359,131
171
8
Ranking Based On Selection: 8
Elena Kinova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,688
2,646
0.984
* Total Citation Counts Rankings
Rankings
376,454
182
9
Ranking Based On Selection: 9
Nikolai Lazarov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,531
989
0.391
* Total Citation Counts Rankings
Rankings
448,909
257
10
Ranking Based On Selection: 10
Georgi Onchev
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,995
707
0.354
culture
psychopathology
psychosis
360° Institutional Performance & Benchmarking Click Here for Live Demo
Gain data-driven strategic insights into your institution’s academic performance, global positioning, and competitive strengths through advanced analysis and benchmarking
with 20 similarly ranked institutions at City, Country, Region, and Global levels.
* Total Citation Counts Rankings
Rankings
463,095
267
11
Ranking Based On Selection: 11
Alexander Shinkov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,909
958
0.502
Endocrinology
Thyroid
Parathyroid
Metabolic bone disease
* Total Citation Counts Rankings
Rankings
494,585
299
12
Ranking Based On Selection: 12
Magdalena Kondeva-Burdina
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,734
1,247
0.719
Toxicology
Drug metabolism
Hepatoprotection
Neuroprotection
* Total Citation Counts Rankings
Rankings
513,686
318
13
Ranking Based On Selection: 13
Paraskev Nedialkov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,639
881
0.538
pharmacognosy
phytochemistry
NMR
LC-MS
GC-MS
* Total Citation Counts Rankings
Rankings
562,351
383
14
Ranking Based On Selection: 14
Maria Staevska
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,420
719
0.506
Allergy & Clinical Immunology
* Total Citation Counts Rankings
Rankings
609,337
437
15
Ranking Based On Selection: 15
Irina Nikolova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,242
382
0.308
* Total Citation Counts Rankings
Rankings
618,114
448
16
Ranking Based On Selection: 16
Ivan Lyutakov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,211
1,210
0.999
Gastroenterology
IBD
Endoscopy
Bile acid malabsorption
Microscopic colitis
* Total Citation Counts Rankings
Rankings
625,045
456
17
Ranking Based On Selection: 17
Ekaterina Kozuharova|Kozhuharova Kohuzarova Kohazurova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,188
808
0.680
Pollination Ecology
Plant Breeding Systems
Invasive plants
Ethnobotany
* Total Citation Counts Rankings
Rankings
643,928
478
18
Ranking Based On Selection: 18
Nikolay Ishkitiev
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,128
408
0.362
* Total Citation Counts Rankings
Rankings
654,920
494
19
Ranking Based On Selection: 19
Dimitar Maslarov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,093
861
0.788
* Total Citation Counts Rankings
Rankings
680,576
529
20
Ranking Based On Selection: 20
Boycho Landzhov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,018
549
0.539
* Total Citation Counts Rankings
Rankings
709,807
558
21
Ranking Based On Selection: 21
Rumiana Simeonova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
938
615
0.656
drug metabolism
drug toxicity
oxidative stress
drug interactions
* Total Citation Counts Rankings
Rankings
720,044
570
22
Ranking Based On Selection: 22
Nevena Chakarova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
912
596
0.654
endocrinology
prediabetes
diabetes
* Total Citation Counts Rankings
Rankings
751,747
630
23
Ranking Based On Selection: 23
Aleksandrina Vlahova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
834
492
0.590
* Total Citation Counts Rankings
Rankings
810,795
724
24
Ranking Based On Selection: 24
Aleksandar Shkondrov
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
703
562
0.799
natural products
saponins
flavonoids
phytochemistry
chromatography
* Total Citation Counts Rankings
Rankings
812,395
728
25
Ranking Based On Selection: 25
A Savova|Alexandra Tzenova-Savova
Medical University Sofia
Sofia, Bulgaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
700
439
0.627
pharmaceutical legislation
pharmacoeconomics
HTA