Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 412 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
Engineering/Environmental Geology
Water quality/health risks
Soil erosion/landslides
Geostatistics
Artificial intelligence
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,754
4,703
0.989
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Enviromental Biochemistry
Nutrition & Toxicology
Phytochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,519
1,402
0.923
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Maternal and fetal medicine
Evidence based medicine
Sexual and Reproductive health
Clinical epidemiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,306
758
0.580
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Pharmacology
Ethnopharmacology
Toxicology
Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,228
989
0.805
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Energy Economics
Environmental Economics
Policy Economics
Cluster Economics
Social Research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,179
1,046
0.887
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Women entrepreneurship
small business management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,059
651
0.615
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Agricultural Extension
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
993
415
0.418
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Obstetrics and Gynaecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
896
401
0.448
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Artificial Intelligence
Operations Research
Industrial and Systems Engineering
Information Tech.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
862
617
0.716
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Infectious diseases
Neonatology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
767
401
0.523
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Media Studies
Gender Studies
Journalism
Public Relations
Advertising.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
753
644
0.855
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Social Determinants of Health
Climate Change related issues
Public/International Health
HIV Medicine
and Women’s Health.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
744
394
0.530
* Total Citation Counts Rankings
Ranking Based On Selection: 13
soil-water-plant environment continum
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
719
390
0.542
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Corporate Finance
Financial Economics
Entreptreneurship
Public Sector Finance
Banking
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
672
373
0.555
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Clinical Chemistry
Toxicology and Nutritional Biochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
657
643
0.979
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Public Sector Admin//Mgt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
655
412
0.629
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Sedimentology
stratigraphy
petroleum geochemistry
paleobiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
639
311
0.487
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Public Health Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
627
433
0.691
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Public Policy Analysis
Political economy
Development studies
Government
Comparative studies
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
509
226
0.444
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Entrepreneurial Finance
Investment Analysis and Portfolio Management
Capital Market Studies
Corporate Finance
Personal Finan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
488
349
0.715
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Nursing Practice/Teaching & Consultancy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
477
476
0.998
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Sedimentology
Sequence Stratigraphy and Reservoir Characterization of Niger Delta Basin and Anambra Basin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
429
248
0.578
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Environmental Chemistry
Analytical Chemistry
Materials Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
428
234
0.547
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Agricultural Extension
Agricultural Planning & Evaluation
Crop Production & Processing
Research Methods and Statistics
all k
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
413
253
0.613
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Comparative government and politics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
402
293
0.729
* Total Citation Counts Rankings
Rankings
219,641
190
1
Ranking Based On Selection: 1
Johnbosco C. Egbueri
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,754
4,703
0.989
Engineering/Environmental Geology
Water quality/health risks
Soil erosion/landslides
Geostatistics
Artificial intelligence
* Total Citation Counts Rankings
Rankings
540,069
1,237
2
Ranking Based On Selection: 2
JC Ifemeje
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,519
1,402
0.923
Enviromental Biochemistry
Nutrition & Toxicology
Phytochemistry
* Total Citation Counts Rankings
Rankings
592,586
1,517
3
Ranking Based On Selection: 3
Ifeanyichukwu Ezebialu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,306
758
0.580
Maternal and fetal medicine
Evidence based medicine
Sexual and Reproductive health
Clinical epidemiology
* Total Citation Counts Rankings
Rankings
614,206
1,643
4
Ranking Based On Selection: 4
Erhirhie Earnest Oghenesuvwe.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,228
989
0.805
Pharmacology
Ethnopharmacology
Toxicology
Biostatistics
* Total Citation Counts Rankings
Rankings
628,832
1,743
5
Ranking Based On Selection: 5
Chukwunonso Ekesiobi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,179
1,046
0.887
Energy Economics
Environmental Economics
Policy Economics
Cluster Economics
Social Research
* Total Citation Counts Rankings
Rankings
667,496
2,032
6
Ranking Based On Selection: 6
Muogbo, Uju S.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,059
651
0.615
Women entrepreneurship
small business management
* Total Citation Counts Rankings
Rankings
690,773
2,303
7
Ranking Based On Selection: 7
Margaret Ngozi Okeke
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
993
415
0.418
Agricultural Extension
* Total Citation Counts Rankings
Rankings
727,778
2,795
8
Ranking Based On Selection: 8
Cyril Chukwuma Ezenyeaku
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
896
401
0.448
Obstetrics and Gynaecology
* Total Citation Counts Rankings
Rankings
741,454
2,959
9
Ranking Based On Selection: 9
Chidozie Chukwuemeka Nwobi-Okoye
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
862
617
0.716
Artificial Intelligence
Operations Research
Industrial and Systems Engineering
Information Tech.
* Total Citation Counts Rankings
Rankings
782,619
3,587
10
Ranking Based On Selection: 10
Obiora Shedrack Ejiofor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
767
401
0.523
* Total Citation Counts Rankings
Rankings
788,770
3,671
11
Ranking Based On Selection: 11
Angela Nwammuo
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
753
644
0.855
Media Studies
Gender Studies
Journalism
Public Relations
Advertising.
* Total Citation Counts Rankings
Rankings
793,026
3,752
12
Ranking Based On Selection: 12
Joe-Ikechebelu Ngozi N.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
744
394
0.530
Social Determinants of Health
Climate Change related issues
Public/International Health
HIV Medicine
and Women’s Health.
* Total Citation Counts Rankings
Rankings
804,844
3,938
13
Ranking Based On Selection: 13
Ikechukwu Aloysius Nweke
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
719
390
0.542
soil-water-plant environment continum
* Total Citation Counts Rankings
Rankings
827,706
4,337
14
Ranking Based On Selection: 14
Vincent N. Ezeabasili
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
672
373
0.555
Corporate Finance
Financial Economics
Entreptreneurship
Public Sector Finance
Banking
* Total Citation Counts Rankings
Rankings
835,015
4,460
15
Ranking Based On Selection: 15
Olisah Michael Chinedu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
657
643
0.979
* Total Citation Counts Rankings
Rankings
836,215
4,487
16
Ranking Based On Selection: 16
Chukwurah, Daniel Chi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
655
412
0.629
Public Sector Admin//Mgt
* Total Citation Counts Rankings
Rankings
844,749
4,654
17
Ranking Based On Selection: 17
Gordian Obi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
639
311
0.487
Sedimentology
stratigraphy
petroleum geochemistry
paleobiology
* Total Citation Counts Rankings
Rankings
850,824
4,766
18
Ranking Based On Selection: 18
Emmanuel Azuike
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
627
433
0.691
Public Health Medicine
* Total Citation Counts Rankings
Rankings
924,514
6,128
19
Ranking Based On Selection: 19
Emeka Anthony Obi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
509
226
0.444
Public Policy Analysis
Political economy
Development studies
Government
Comparative studies
* Total Citation Counts Rankings
Rankings
941,671
6,441
20
Ranking Based On Selection: 20
Udoka Bernard Alajekwu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
488
349
0.715
Entrepreneurial Finance
Investment Analysis and Portfolio Management
Capital Market Studies
Corporate Finance
Personal Finan
* Total Citation Counts Rankings
Rankings
950,767
6,630
21
Ranking Based On Selection: 21
Adaobi Maryann Ibekwe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
477
476
0.998
Nursing Practice/Teaching & Consultancy
* Total Citation Counts Rankings
Rankings
994,750
7,463
22
Ranking Based On Selection: 22
Oi Chiaghanam
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
429
248
0.578
Sedimentology
Sequence Stratigraphy and Reservoir Characterization of Niger Delta Basin and Anambra Basin
* Total Citation Counts Rankings
Rankings
995,798
7,491
23
Ranking Based On Selection: 23
Onyebuchi Joseph Nwadiogbu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
428
234
0.547
Environmental Chemistry
Analytical Chemistry
Materials Chemistry
* Total Citation Counts Rankings
Rankings
1,010,252
7,770
24
Ranking Based On Selection: 24
Nwalieji Hyacinth Udeanya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
413
253
0.613
Agricultural Extension
Agricultural Planning & Evaluation
Crop Production & Processing
Research Methods and Statistics
all k
* Total Citation Counts Rankings
Rankings
1,021,068
7,979
25
Ranking Based On Selection: 25
Ikenna Alumona
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
402
293
0.729
Comparative government and politics