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Citation Rankings
Highly Cited Researchers

Highly Cited Researchers Citation Rankings 2025

The Citation Rankings (Highly Cited Researchers) 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.

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Total 441 scientist
* Total Citation Counts Rankings
World Rank
289,638
Country Rank
314
Institution Rank: 1
Ranking Based On Selection: 1
Nigeria
Godsent Chichebem Isiguzo
Godsent Chichebem Isiguzo
Ebonyi State University
Abakaliki , Nigeria
Medical and Health Sciences / Cardiology
hypertension
heart failure
NCD epidemiology
pericardial disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,413
3,327
0.975
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
316,546
Country Rank
373
Institution Rank: 2
Ranking Based On Selection: 2
Nigeria
Patrick Maduabuchi Aja|PM Aja, Aja, P.M., Patrick M. Aja
Patrick Maduabuchi Aja|PM Aja, Aja, P.M., Patrick M. Aja
Ebonyi State University
Abakaliki , Nigeria
Natural Sciences / Molecular Biology & Genetics
Nutritional Biochemistry
Medical Biochemistry
Natural product
Nutraceuticals
Computational
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,071
2,561
0.834
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
492,841
Country Rank
997
Institution Rank: 3
Ranking Based On Selection: 3
Nigeria
Ike-Elechi Ogba
Ike-Elechi Ogba
Ebonyi State University
Abakaliki , Nigeria
Business & Management / Marketing
marketing
consumer behavior
HRM
commitment
management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,702
1,109
0.652
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
597,042
Country Rank
1,522
Institution Rank: 4
Ranking Based On Selection: 4
Nigeria
Orji Obasi Uche
Orji Obasi Uche
Ebonyi State University
Abakaliki , Nigeria
Medical and Health Sciences / Biochemistry
Environmental Biochemistry and Toxicology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,255
1,074
0.856
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
644,770
Country Rank
1,811
Institution Rank: 5
Ranking Based On Selection: 5
Nigeria
Edmund Ndudi Ossai
Edmund Ndudi Ossai
Ebonyi State University
Abakaliki , Nigeria
Medical and Health Sciences / Epidemiology and Public Health
Public Health
Health Systems
Medical Education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,098
1,022
0.931
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
677,447
Country Rank
2,117
Institution Rank: 6
Ranking Based On Selection: 6
Nigeria
Justus Ndulue Eze
Justus Ndulue Eze
Ebonyi State University
Abakaliki , Nigeria
Others
Reproductive Health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,003
584
0.582
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
678,806
Country Rank
2,139
Institution Rank: 7
Ranking Based On Selection: 7
Nigeria
Nnennaya Ajayi
Nnennaya Ajayi
Ebonyi State University
Abakaliki , Nigeria
Others
Internal Medicine/Gastroenterology/Infectious Diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
999
767
0.768
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
692,414
Country Rank
2,312
Institution Rank: 8
Ranking Based On Selection: 8
Nigeria
Happiness Ogba Oselebe
Happiness Ogba Oselebe
Ebonyi State University
Abakaliki , Nigeria
Agriculture & Forestry / Plant Science
Plant Breeding and Genetics Crop Improvement)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
962
577
0.600
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
694,934
Country Rank
2,345
Institution Rank: 9
Ranking Based On Selection: 9
Nigeria
Augustine Okpani Oko
Augustine Okpani Oko
Ebonyi State University
Abakaliki , Nigeria
Engineering & Technology / Food Science and Engineering
Nutraceuticals and Food Biotechnology
food biofortification
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
955
671
0.703
See All Rankings and Analysis

Showcase your academic strength and achievements to the world in the most effective way – join now and achieve results fast!

* Total Citation Counts Rankings
World Rank
710,056
Country Rank
2,528
Institution Rank: 10
Ranking Based On Selection: 10
Nigeria
Johnson Akuma Obuna
Johnson Akuma Obuna
Ebonyi State University
Abakaliki , Nigeria
Others
Infertility and Endocrinology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
916
612
0.668
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
720,764
Country Rank
2,668
Institution Rank: 11
Ranking Based On Selection: 11
Nigeria
Lawrence Ulu Ogbonnaya
Lawrence Ulu Ogbonnaya
Ebonyi State University
Abakaliki , Nigeria
Others
Infectious Diseases Epidemiology
Health Policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
889
621
0.699
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
721,128
Country Rank
2,672
Institution Rank: 12
Ranking Based On Selection: 12
Nigeria
Celestine Afiukwa
Celestine Afiukwa
Ebonyi State University
Abakaliki , Nigeria
Agriculture & Forestry / Agricultural Biotechnology
Agricultural biotechnology
molecular biology
medical biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
888
684
0.770
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
733,789
Country Rank
2,844
Institution Rank: 13
Ranking Based On Selection: 13
Nigeria
Ezeanosike Obumneme
Ezeanosike Obumneme
Ebonyi State University
Abakaliki , Nigeria
Medical and Health Sciences / Neonatology
Paediatrics
Neonatology
Pharmacology
Clinical Trials
Statistics and Study Design
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
857
827
0.965
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
747,653
Country Rank
3,050
Institution Rank: 14
Ranking Based On Selection: 14
Nigeria
Laura Okpala (Nee Igboeli)
Laura Okpala (Nee Igboeli)
Ebonyi State University
Abakaliki , Nigeria
Engineering & Technology / Food Science and Engineering
Food processing
nutrition
food engineering
food safety
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
825
453
0.549
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
759,771
Country Rank
3,244
Institution Rank: 15
Ranking Based On Selection: 15
Nigeria
Ngozi Ifebunandu
Ngozi Ifebunandu
Ebonyi State University
Abakaliki , Nigeria
Others
hiv
nephrology
tuberculosis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
797
404
0.507
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
774,900
Country Rank
3,447
Institution Rank: 16
Ranking Based On Selection: 16
Nigeria
Boniface Brown Nnamdi Ejikeme
Boniface Brown Nnamdi Ejikeme
Ebonyi State University
Abakaliki , Nigeria
Others
Reproductive Endocrinology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
763
399
0.523
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
777,412
Country Rank
3,495
Institution Rank: 17
Ranking Based On Selection: 17
Nigeria
Philip Obasi
Philip Obasi
Ebonyi State University
Abakaliki , Nigeria
Engineering & Technology / Earth Sciences
Hydrochemistry
Hydrogeochemistry and hydrogeophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
757
717
0.947
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
781,191
Country Rank
3,551
Institution Rank: 18
Ranking Based On Selection: 18
Nigeria
Maryann Ugochi Ibekwe
Maryann Ugochi Ibekwe
Ebonyi State University
Abakaliki , Nigeria
Others
Paediatric endocrinology
Diabetes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
749
593
0.792
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
781,856
Country Rank
3,567
Institution Rank: 19
Ranking Based On Selection: 19
Nigeria
Okechukwu Idumah Okogwu
Okechukwu Idumah Okogwu
Ebonyi State University
Abakaliki , Nigeria
Natural Sciences / Biological Science
Water quality
Toxicology
Ecology
Hydrobiology
Sustainability
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
748
427
0.571
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
783,789
Country Rank
3,591
Institution Rank: 20
Ranking Based On Selection: 20
Nigeria
Perpetus C Ibekwe
Perpetus C Ibekwe
Ebonyi State University
Abakaliki , Nigeria
Others
Family Planning and Reproductive Health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
744
330
0.444
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
786,359
Country Rank
3,634
Institution Rank: 21
Ranking Based On Selection: 21
Nigeria
Paulinus Nnabo
Paulinus Nnabo
Ebonyi State University
Abakaliki , Nigeria
Economics & Econometrics / Economics
Economic and Environment Geolgy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
738
486
0.659
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
795,710
Country Rank
3,782
Institution Rank: 22
Ranking Based On Selection: 22
Nigeria
Emeka Onwe
Emeka Onwe
Ebonyi State University
Abakaliki , Nigeria
Medical and Health Sciences / Neonatology
Paediatrics
Neonatology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
718
655
0.912
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
808,988
Country Rank
4,000
Institution Rank: 23
Ranking Based On Selection: 23
Nigeria
Okoli Eric
Okoli Eric
Ebonyi State University
Abakaliki , Nigeria
Engineering & Technology / Food Science and Engineering
food science and technology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
691
387
0.560
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
820,347
Country Rank
4,184
Institution Rank: 24
Ranking Based On Selection: 24
Nigeria
Simon Uguru Nwibo
Simon Uguru Nwibo
Ebonyi State University
Abakaliki , Nigeria
Agriculture & Forestry / Agriculture
Agribusiness
Agricultural Marketing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
668
506
0.757
See All Rankings and Analysis
* Total Citation Counts Rankings
World Rank
822,529
Country Rank
4,226
Institution Rank: 25
Ranking Based On Selection: 25
Nigeria
James Nte Nwite
James Nte Nwite
Ebonyi State University
Abakaliki , Nigeria
Others
Soil Productivity and Conservation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
664
390
0.587
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
289,638
Nigeria
314
1
Ranking Based On Selection: 1
Godsent Chichebem Isiguzo
Godsent Chichebem Isiguzo
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,413
3,327
0.975
Medical and Health Sciences / Cardiology
hypertension
heart failure
NCD epidemiology
pericardial disease
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
316,546
Nigeria
373
2
Ranking Based On Selection: 2
Patrick Maduabuchi Aja|PM Aja, Aja, P.M., Patrick M. Aja
Patrick Maduabuchi Aja|PM Aja, Aja, P.M., Patrick M. Aja
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,071
2,561
0.834
Natural Sciences / Molecular Biology & Genetics
Nutritional Biochemistry
Medical Biochemistry
Natural product
Nutraceuticals
Computational
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
492,841
Nigeria
997
3
Ranking Based On Selection: 3
Ike-Elechi Ogba
Ike-Elechi Ogba
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,702
1,109
0.652
Business & Management / Marketing
marketing
consumer behavior
HRM
commitment
management
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
597,042
Nigeria
1,522
4
Ranking Based On Selection: 4
Orji Obasi Uche
Orji Obasi Uche
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,255
1,074
0.856
Medical and Health Sciences / Biochemistry
Environmental Biochemistry and Toxicology
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
644,770
Nigeria
1,811
5
Ranking Based On Selection: 5
Edmund Ndudi Ossai
Edmund Ndudi Ossai
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,098
1,022
0.931
Medical and Health Sciences / Epidemiology and Public Health
Public Health
Health Systems
Medical Education
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
677,447
Nigeria
2,117
6
Ranking Based On Selection: 6
Justus Ndulue Eze
Justus Ndulue Eze
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,003
584
0.582
Others
Reproductive Health
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
678,806
Nigeria
2,139
7
Ranking Based On Selection: 7
Nnennaya Ajayi
Nnennaya Ajayi
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
999
767
0.768
Others
Internal Medicine/Gastroenterology/Infectious Diseases
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
692,414
Nigeria
2,312
8
Ranking Based On Selection: 8
Happiness Ogba Oselebe
Happiness Ogba Oselebe
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
962
577
0.600
Agriculture & Forestry / Plant Science
Plant Breeding and Genetics Crop Improvement)
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
694,934
Nigeria
2,345
9
Ranking Based On Selection: 9
Augustine Okpani Oko
Augustine Okpani Oko
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
955
671
0.703
Engineering & Technology / Food Science and Engineering
Nutraceuticals and Food Biotechnology
food biofortification
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
710,056
Nigeria
2,528
10
Ranking Based On Selection: 10
Johnson Akuma Obuna
Johnson Akuma Obuna
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
916
612
0.668
Others
Infertility and Endocrinology
See All Rankings and Analysis

Showcase your academic strength and achievements to the world in the most effective way – join now and achieve results fast!

* Total Citation Counts Rankings
Rankings
720,764
Nigeria
2,668
11
Ranking Based On Selection: 11
Lawrence Ulu Ogbonnaya
Lawrence Ulu Ogbonnaya
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
889
621
0.699
Others
Infectious Diseases Epidemiology
Health Policy
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
721,128
Nigeria
2,672
12
Ranking Based On Selection: 12
Celestine Afiukwa
Celestine Afiukwa
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
888
684
0.770
Agriculture & Forestry / Agricultural Biotechnology
Agricultural biotechnology
molecular biology
medical biotechnology
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
733,789
Nigeria
2,844
13
Ranking Based On Selection: 13
Ezeanosike Obumneme
Ezeanosike Obumneme
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
857
827
0.965
Medical and Health Sciences / Neonatology
Paediatrics
Neonatology
Pharmacology
Clinical Trials
Statistics and Study Design
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
747,653
Nigeria
3,050
14
Ranking Based On Selection: 14
Laura Okpala (Nee Igboeli)
Laura Okpala (Nee Igboeli)
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
825
453
0.549
Engineering & Technology / Food Science and Engineering
Food processing
nutrition
food engineering
food safety
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
759,771
Nigeria
3,244
15
Ranking Based On Selection: 15
Ngozi Ifebunandu
Ngozi Ifebunandu
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
797
404
0.507
Others
hiv
nephrology
tuberculosis
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
774,900
Nigeria
3,447
16
Ranking Based On Selection: 16
Boniface Brown Nnamdi Ejikeme
Boniface Brown Nnamdi Ejikeme
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
763
399
0.523
Others
Reproductive Endocrinology
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
777,412
Nigeria
3,495
17
Ranking Based On Selection: 17
Philip Obasi
Philip Obasi
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
757
717
0.947
Engineering & Technology / Earth Sciences
Hydrochemistry
Hydrogeochemistry and hydrogeophysics
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
781,191
Nigeria
3,551
18
Ranking Based On Selection: 18
Maryann Ugochi Ibekwe
Maryann Ugochi Ibekwe
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
749
593
0.792
Others
Paediatric endocrinology
Diabetes
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
781,856
Nigeria
3,567
19
Ranking Based On Selection: 19
Okechukwu Idumah Okogwu
Okechukwu Idumah Okogwu
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
748
427
0.571
Natural Sciences / Biological Science
Water quality
Toxicology
Ecology
Hydrobiology
Sustainability
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
783,789
Nigeria
3,591
20
Ranking Based On Selection: 20
Perpetus C Ibekwe
Perpetus C Ibekwe
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
744
330
0.444
Others
Family Planning and Reproductive Health
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
786,359
Nigeria
3,634
21
Ranking Based On Selection: 21
Paulinus Nnabo
Paulinus Nnabo
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
738
486
0.659
Economics & Econometrics / Economics
Economic and Environment Geolgy
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
795,710
Nigeria
3,782
22
Ranking Based On Selection: 22
Emeka Onwe
Emeka Onwe
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
718
655
0.912
Medical and Health Sciences / Neonatology
Paediatrics
Neonatology
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
808,988
Nigeria
4,000
23
Ranking Based On Selection: 23
Okoli Eric
Okoli Eric
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
691
387
0.560
Engineering & Technology / Food Science and Engineering
food science and technology
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
820,347
Nigeria
4,184
24
Ranking Based On Selection: 24
Simon Uguru Nwibo
Simon Uguru Nwibo
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
668
506
0.757
Agriculture & Forestry / Agriculture
Agribusiness
Agricultural Marketing
See All Rankings and Analysis
* Total Citation Counts Rankings
Rankings
822,529
Nigeria
4,226
25
Ranking Based On Selection: 25
James Nte Nwite
James Nte Nwite
Ebonyi State University Abakaliki, Nigeria Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
664
390
0.587
Others
Soil Productivity and Conservation
See All Rankings and Analysis