Citation Rankings
Highly Cited Researchers
University of Nigeria Highly Cited Researchers Citation Rankings 2025
Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: 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
Health Economics
Public Health
Health Policy and Systems Research
Pharmaco-economics
Pharmaco-epidemiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,932
43,310
0.867
* Total Citation Counts Rankings
Ranking Based On Selection :2
Public Health
Health Systems and Policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,522
31,875
0.807
* Total Citation Counts Rankings
Ranking Based On Selection :3
Marketing
Cons Behavior
Int Business & Sys Lit Review
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,002
28,342
0.945
* Total Citation Counts Rankings
Ranking Based On Selection :4
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,766
20,347
0.856
* Total Citation Counts Rankings
Ranking Based On Selection :5
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,803
18,105
0.914
* Total Citation Counts Rankings
Ranking Based On Selection :6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,439
9,543
0.581
* Total Citation Counts Rankings
Ranking Based On Selection :7
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,446
14,270
0.988
* Total Citation Counts Rankings
Ranking Based On Selection :8
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,877
6,170
0.519
* Total Citation Counts Rankings
Ranking Based On Selection :9
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,780
3,885
0.330
* Total Citation Counts Rankings
Ranking Based On Selection :10
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,568
6,446
0.674
* Total Citation Counts Rankings
Ranking Based On Selection :11
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,957
7,450
0.832
* Total Citation Counts Rankings
Ranking Based On Selection :12
Physics
Materials Science
Nanomaterials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,057
6,649
0.825
* Total Citation Counts Rankings
Ranking Based On Selection :13
PHYSICAL/COMPUTATIONAL CHEMISTRY
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,814
3,924
0.502
* Total Citation Counts Rankings
Ranking Based On Selection :14
Ethnopharmacology
Natural Products Pharmacology
Autonomic Pharmacology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,190
2,641
0.367
* Total Citation Counts Rankings
Ranking Based On Selection :15
Pharmaceutics
drug delivery
nanotechnology/nanomedicines
pharmaceutical microbiology & biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,350
3,479
0.548
* Total Citation Counts Rankings
Ranking Based On Selection :16
Bioprocess engineering
Fermentation technology
Bio-energy
Microalgae biotechnology
Photobioreactors.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,608
2,182
0.389
* Total Citation Counts Rankings
Ranking Based On Selection :17
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,326
3,227
0.606
* Total Citation Counts Rankings
Ranking Based On Selection :18
METALLURGICAL AND MATERIALS ENGINEERING
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,138
3,618
0.704
* Total Citation Counts Rankings
Ranking Based On Selection :19
Cardiothoracic surgery
vascular surgery
esophageal surgery
surgical education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,787
1,982
0.414
* Total Citation Counts Rankings
Ranking Based On Selection :20
Sustainable Human Settlements
Post Occupancy Evaluation
e-Procurement in Construction
Environment and Behaviour
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,610
3,325
0.721
* Total Citation Counts Rankings
Ranking Based On Selection :21
Nephrology
Cardio-metabolic syndrome
Transplant Science
Clinical Trials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,380
3,033
0.692
* Total Citation Counts Rankings
Ranking Based On Selection :22
Organisational behaviour
extra-role behaviour
wellbeing and health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,365
3,718
0.852
* Total Citation Counts Rankings
Ranking Based On Selection :23
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,284
1,140
0.266
* Total Citation Counts Rankings
Ranking Based On Selection :24
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,136
1,400
0.338
* Total Citation Counts Rankings
Ranking Based On Selection :25
Materials/Physical Chemistry
Wastewater treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,886
3,369
0.867
* Total Citation Counts Rankings
Rankings
9,683
10
1
Ranking Based On Selection: 1
Obinna E. Onwujekwe
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,932
43,310
0.867
Health Economics
Public Health
Health Policy and Systems Research
Pharmaco-economics
Pharmaco-epidemiology
* Total Citation Counts Rankings
Rankings
14,050
11
2
Ranking Based On Selection: 2
Benjamin Uzochukwu
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,522
31,875
0.807
Public Health
Health Systems and Policy
* Total Citation Counts Rankings
Rankings
21,613
13
1
Ranking Based On Selection: 3
Justin Paul
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,002
28,342
0.945
Marketing
Cons Behavior
Int Business & Sys Lit Review
* Total Citation Counts Rankings
Rankings
30,804
17
2
Ranking Based On Selection: 4
Ashish Khanna
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,766
20,347
0.856
* Total Citation Counts Rankings
Rankings
39,862
22
3
Ranking Based On Selection: 5
Sanjeevikumar Padmanaban
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,803
18,105
0.914
* Total Citation Counts Rankings
Rankings
51,309
24
4
Ranking Based On Selection: 6
Luis Miguel Cardoso
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,439
9,543
0.581
* Total Citation Counts Rankings
Rankings
60,851
29
5
Ranking Based On Selection: 7
Gaurav Dhiman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,446
14,270
0.988
* Total Citation Counts Rankings
Rankings
78,051
34
6
Ranking Based On Selection: 8
Hanaa Hachimi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,877
6,170
0.519
* Total Citation Counts Rankings
Rankings
78,792
35
7
Ranking Based On Selection: 9
Ryo Takahashi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,780
3,885
0.330
* Total Citation Counts Rankings
Rankings
100,612
44
8
Ranking Based On Selection: 10
Xavier Fernando
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,568
6,446
0.674
* Total Citation Counts Rankings
Rankings
108,527
50
9
Ranking Based On Selection: 11
Abdulsalam Abdullahi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,957
7,450
0.832
* Total Citation Counts Rankings
Rankings
122,227
57
3
Ranking Based On Selection: 12
Fabian Ezema
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,057
6,649
0.825
* Total Citation Counts Rankings
Rankings
126,473
59
4
Ranking Based On Selection: 13
Nnabuk Okon Eddy
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,814
3,924
0.502
* Total Citation Counts Rankings
Rankings
138,426
72
5
Ranking Based On Selection: 14
Peter A. Akah
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,190
2,641
0.367
Ethnopharmacology
Natural Products Pharmacology
Autonomic Pharmacology
* Total Citation Counts Rankings
Rankings
157,593
96
6
Ranking Based On Selection: 15
Anthony Attama
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,350
3,479
0.548
Pharmaceutics
drug delivery
nanotechnology/nanomedicines
pharmaceutical microbiology & biotechnology
* Total Citation Counts Rankings
Rankings
178,497
125
7
Ranking Based On Selection: 16
James Chukwuma Ogbonna
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,608
2,182
0.389
Bioprocess engineering
Fermentation technology
Bio-energy
Microalgae biotechnology
Photobioreactors.
* Total Citation Counts Rankings
Rankings
187,619
135
10
Ranking Based On Selection: 17
Akhtar Kalam
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,326
3,227
0.606
* Total Citation Counts Rankings
Rankings
194,272
141
8
Ranking Based On Selection: 18
VS Aigbodion
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,138
3,618
0.704
METALLURGICAL AND MATERIALS ENGINEERING
* Total Citation Counts Rankings
Rankings
208,106
164
9
Ranking Based On Selection: 19
John C. Eze
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,787
1,982
0.414
Cardiothoracic surgery
vascular surgery
esophageal surgery
surgical education
* Total Citation Counts Rankings
Rankings
215,656
176
10
Ranking Based On Selection: 20
Eziyi O. Ibem
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,610
3,325
0.721
Sustainable Human Settlements
Post Occupancy Evaluation
e-Procurement in Construction
Environment and Behaviour
* Total Citation Counts Rankings
Rankings
226,127
187
11
Ranking Based On Selection: 21
Ifeoma Ulasi
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,380
3,033
0.692
Nephrology
Cardio-metabolic syndrome
Transplant Science
Clinical Trials
* Total Citation Counts Rankings
Rankings
226,849
188
12
Ranking Based On Selection: 22
Ike E. Onyishi
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,365
3,718
0.852
Organisational behaviour
extra-role behaviour
wellbeing and health
* Total Citation Counts Rankings
Rankings
230,857
197
13
Ranking Based On Selection: 23
Chukwuma Charles Soludo
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,284
1,140
0.266
* Total Citation Counts Rankings
Rankings
238,483
205
14
Ranking Based On Selection: 24
Ogbu Kalu
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,136
1,400
0.338
* Total Citation Counts Rankings
Rankings
252,537
230
15
Ranking Based On Selection: 25
Kovo Akpomie
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,886
3,369
0.867
Materials/Physical Chemistry
Wastewater treatment