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
32,654
Country Rank
1
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/11167.png)
![Sierra Leone](/flags/sl.png)
![Osman Sankoh](https://cdn.adscientificindex.com/pictures/90/4305819.jpg)
Statistics
Epidemiology
Public Health
GIS
Literature
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,879
12,779
0.559
* Total Citation Counts Rankings
World Rank
45,813
Country Rank
2
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Paul Richards](https://cdn.adscientificindex.com/pictures/4d/88733.jpg)
Social change in post conflict countries
social response to zoonotic diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,922
3,635
0.203
* Total Citation Counts Rankings
World Rank
69,362
Country Rank
3
Institution Rank : 2
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Bockarie M](https://cdn.adscientificindex.com/pictures/24/4986721.jpg)
Neglected Tropical Diseases
Entomology
Health Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,106
4,718
0.360
* Total Citation Counts Rankings
World Rank
210,650
Country Rank
4
Institution Rank : 3
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Richard Wadsworth](https://cdn.adscientificindex.com/pictures/86/89465.jpg)
land cover
pollution
Sierra Leone
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,744
1,413
0.298
* Total Citation Counts Rankings
World Rank
251,778
Country Rank
5
Institution Rank : 4
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Rashid Ansumana](https://cdn.adscientificindex.com/pictures/f5/89265.jpg)
Tropical Medicine
Epidemiology
Infectious diseases
surveillance
mhealth
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,915
3,112
0.795
* Total Citation Counts Rankings
World Rank
390,597
Country Rank
6
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/11375.jpg)
![Sierra Leone](/flags/sl.png)
![Haja Ramatulai Wurie](https://cdn.adscientificindex.com/pictures/c3/4308865.jpg)
Health policy and practice
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,295
1,984
0.864
* Total Citation Counts Rankings
World Rank
478,069
Country Rank
7
Institution Rank : 5
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Ibrahim Denis Fofanah](https://cdn.adscientificindex.com/pictures/e2/4986725.jpg)
Data Science
AI
Social Justice
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,733
854
0.493
* Total Citation Counts Rankings
World Rank
490,307
Country Rank
8
Institution Rank : 2
![](https://cdn.adscientificindex.com/logos/11375.jpg)
![Sierra Leone](/flags/sl.png)
![James Baligeh Walter Russell](https://cdn.adscientificindex.com/pictures/19/4986741.jpg)
Cardiology
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,669
1,111
0.666
* Total Citation Counts Rankings
World Rank
490,314
Country Rank
9
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/16816.png)
![Sierra Leone](/flags/sl.png)
![Emerson Abraham Jackson](https://cdn.adscientificindex.com/pictures/4e/4308847.jpg)
Financial Economics
Economic Policy Management
Monetary Policy Analysis
Livelihood Analysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,669
1,064
0.638
* Total Citation Counts Rankings
World Rank
494,426
Country Rank
10
Institution Rank : 6
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Juana P. Moiwo](https://cdn.adscientificindex.com/pictures/86/4986722.jpg)
Agricultural Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,649
973
0.590
* Total Citation Counts Rankings
World Rank
500,935
Country Rank
11
Institution Rank : 3
![](https://cdn.adscientificindex.com/logos/11375.jpg)
![Sierra Leone](/flags/sl.png)
![Sulaiman Lakoh](https://cdn.adscientificindex.com/pictures/79/4308970.jpg)
Infectious Diseases
Public Health and Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,617
1,588
0.982
* Total Citation Counts Rankings
World Rank
523,706
Country Rank
12
Institution Rank : 4
![](https://cdn.adscientificindex.com/logos/11375.jpg)
![Sierra Leone](/flags/sl.png)
![Kelleh Gbawuru Mansaray](https://cdn.adscientificindex.com/pictures/97/100882.jpg)
Renewable energy technologies
greenhouse gas mitigation
solid waste management and utilization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,513
466
0.308
* Total Citation Counts Rankings
World Rank
631,392
Country Rank
13
Institution Rank : 7
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Hindowa Lebbie](/user/assets/images/profile/no-profile-photo.png)
Renewable energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,111
400
0.360
* Total Citation Counts Rankings
World Rank
670,092
Country Rank
14
Institution Rank : 5
![](https://cdn.adscientificindex.com/logos/11375.jpg)
![Sierra Leone](/flags/sl.png)
![Babatunde Duduyemi](https://cdn.adscientificindex.com/pictures/0d/4308825.jpg)
Pathology
Medicine
Physiology
Hepatogastroenterology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
997
832
0.835
* Total Citation Counts Rankings
World Rank
675,463
Country Rank
15
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/2336.jpg)
![Sierra Leone](/flags/sl.png)
![Raoul Emeric Guetiya Wadoum](https://cdn.adscientificindex.com/pictures/01/4991022.jpg)
Epidemiology of Infectious Diseases
Virology
Immunology
Bacteriology
Biochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
982
774
0.788
* Total Citation Counts Rankings
World Rank
737,250
Country Rank
16
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/16744.png)
![Sierra Leone](/flags/sl.png)
![Adam S Kanu](https://cdn.adscientificindex.com/pictures/30/5011088.jpg)
Cereal Crops Research. plant stress
soil remediation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
827
751
0.908
* Total Citation Counts Rankings
World Rank
739,618
Country Rank
17
Institution Rank : 8
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Aiah Lebbie](https://cdn.adscientificindex.com/pictures/2d/103204.jpg)
Sacred Groves
Podostemaceae
Tropical Plants
Ecological Surveillance of Viral Pathogens
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
822
448
0.545
* Total Citation Counts Rankings
World Rank
761,913
Country Rank
18
Institution Rank : 9
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Victor. P. Bagla](/user/assets/images/profile/no-profile-photo.png)
Medicinal plant research
Veterinary Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
772
468
0.606
* Total Citation Counts Rankings
World Rank
768,948
Country Rank
19
Institution Rank : 10
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Sheku Alfred Kanu](https://cdn.adscientificindex.com/pictures/c0/4360593.jpg)
Argriculture
Plant Physiology
Biological Nitrogen Fixation
Water Quality Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
756
630
0.833
* Total Citation Counts Rankings
World Rank
769,072
Country Rank
20
Institution Rank : 11
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Mathew Didlyn Kpundeh|Kpundeh Mathew Didlyn, Kpundeh M.D, Mathew D. Kpundeh](https://cdn.adscientificindex.com/pictures/98/4986724.jpg)
Blue Economic diversification in the era of Climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
756
506
0.669
* Total Citation Counts Rankings
World Rank
889,925
Country Rank
21
Institution Rank : 6
![](https://cdn.adscientificindex.com/logos/11375.jpg)
![Sierra Leone](/flags/sl.png)
![Ronnie Frazer-Williams](https://cdn.adscientificindex.com/pictures/9e/4986742.jpg)
heavy metals
wastewater
grey water
solid waste management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
524
263
0.502
* Total Citation Counts Rankings
World Rank
902,653
Country Rank
22
Institution Rank : 12
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Samuel Joseph Bebeley](https://cdn.adscientificindex.com/pictures/2a/4360523.jpg)
Physical Activity & Public Health
Public Health Nutrition
Health Education Promotion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
502
335
0.667
* Total Citation Counts Rankings
World Rank
911,658
Country Rank
23
Institution Rank : 7
![](https://cdn.adscientificindex.com/logos/11375.jpg)
![Sierra Leone](/flags/sl.png)
![Edward Hinga Sandy](https://cdn.adscientificindex.com/pictures/4c/106615.jpg)
Environmental Science and Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
487
313
0.643
* Total Citation Counts Rankings
World Rank
923,028
Country Rank
24
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/11159.png)
![Sierra Leone](/flags/sl.png)
![Curtis FJ Doebbler](https://cdn.adscientificindex.com/pictures/b2/3473079.jpg)
law
international law
criminal justice
law and society
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
469
167
0.356
* Total Citation Counts Rankings
World Rank
924,571
Country Rank
25
Institution Rank : 13
![](https://cdn.adscientificindex.com/logos/6383.jpg)
![Sierra Leone](/flags/sl.png)
![Alhaji Morlai Bangura](https://cdn.adscientificindex.com/pictures/69/4360721.jpg)
developmental issues
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
466
396
0.850
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
32,654
![Sierra Leone](/flags/sl.png)
1
![](https://cdn.adscientificindex.com/logos/11167.png)
1
Osman Sankoh
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,879
12,779
0.559
![](https://cdn.adscientificindex.com/logos/11167.png)
Statistics
Epidemiology
Public Health
GIS
Literature
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
45,813
![Sierra Leone](/flags/sl.png)
2
![](https://cdn.adscientificindex.com/logos/6383.jpg)
1
Paul Richards
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,922
3,635
0.203
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Social change in post conflict countries
social response to zoonotic diseases
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
69,362
![Sierra Leone](/flags/sl.png)
3
![](https://cdn.adscientificindex.com/logos/6383.jpg)
2
Bockarie M
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,106
4,718
0.360
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
210,650
![Sierra Leone](/flags/sl.png)
4
![](https://cdn.adscientificindex.com/logos/6383.jpg)
3
Richard Wadsworth
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,744
1,413
0.298
![](https://cdn.adscientificindex.com/logos/6383.jpg)
land cover
pollution
Sierra Leone
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
251,778
![Sierra Leone](/flags/sl.png)
5
![](https://cdn.adscientificindex.com/logos/6383.jpg)
4
Rashid Ansumana
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,915
3,112
0.795
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Tropical Medicine
Epidemiology
Infectious diseases
surveillance
mhealth
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
390,597
![Sierra Leone](/flags/sl.png)
6
![](https://cdn.adscientificindex.com/logos/11375.jpg)
1
Haja Ramatulai Wurie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,295
1,984
0.864
![](https://cdn.adscientificindex.com/logos/11375.jpg)
Health policy and practice
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
478,069
![Sierra Leone](/flags/sl.png)
7
![](https://cdn.adscientificindex.com/logos/6383.jpg)
5
Ibrahim Denis Fofanah
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,733
854
0.493
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Data Science
AI
Social Justice
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
490,307
![Sierra Leone](/flags/sl.png)
8
![](https://cdn.adscientificindex.com/logos/11375.jpg)
2
James Baligeh Walter Russell
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,669
1,111
0.666
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
490,314
![Sierra Leone](/flags/sl.png)
9
![](https://cdn.adscientificindex.com/logos/16816.png)
1
Emerson Abraham Jackson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,669
1,064
0.638
![](https://cdn.adscientificindex.com/logos/16816.png)
Financial Economics
Economic Policy Management
Monetary Policy Analysis
Livelihood Analysis
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
494,426
![Sierra Leone](/flags/sl.png)
10
![](https://cdn.adscientificindex.com/logos/6383.jpg)
6
Juana P. Moiwo
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,649
973
0.590
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Agricultural Engineering
![Adscientificindex](/assets/images/banner_logo.png)
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![Adscientificindex](/assets/images/banner_click.png)
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
500,935
![Sierra Leone](/flags/sl.png)
11
![](https://cdn.adscientificindex.com/logos/11375.jpg)
3
Sulaiman Lakoh
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,617
1,588
0.982
![](https://cdn.adscientificindex.com/logos/11375.jpg)
Infectious Diseases
Public Health and Internal Medicine
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
523,706
![Sierra Leone](/flags/sl.png)
12
![](https://cdn.adscientificindex.com/logos/11375.jpg)
4
Kelleh Gbawuru Mansaray
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,513
466
0.308
![](https://cdn.adscientificindex.com/logos/11375.jpg)
Renewable energy technologies
greenhouse gas mitigation
solid waste management and utilization
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
631,392
![Sierra Leone](/flags/sl.png)
13
![](https://cdn.adscientificindex.com/logos/6383.jpg)
7
Hindowa Lebbie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,111
400
0.360
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
670,092
![Sierra Leone](/flags/sl.png)
14
![](https://cdn.adscientificindex.com/logos/11375.jpg)
5
Babatunde Duduyemi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
997
832
0.835
![](https://cdn.adscientificindex.com/logos/11375.jpg)
Pathology
Medicine
Physiology
Hepatogastroenterology
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
675,463
![Sierra Leone](/flags/sl.png)
15
![](https://cdn.adscientificindex.com/logos/2336.jpg)
1
Raoul Emeric Guetiya Wadoum
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
982
774
0.788
![](https://cdn.adscientificindex.com/logos/2336.jpg)
Epidemiology of Infectious Diseases
Virology
Immunology
Bacteriology
Biochemistry
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
737,250
![Sierra Leone](/flags/sl.png)
16
![](https://cdn.adscientificindex.com/logos/16744.png)
1
Adam S Kanu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
827
751
0.908
![](https://cdn.adscientificindex.com/logos/16744.png)
Cereal Crops Research. plant stress
soil remediation
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
739,618
![Sierra Leone](/flags/sl.png)
17
![](https://cdn.adscientificindex.com/logos/6383.jpg)
8
Aiah Lebbie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
822
448
0.545
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Sacred Groves
Podostemaceae
Tropical Plants
Ecological Surveillance of Viral Pathogens
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
761,913
![Sierra Leone](/flags/sl.png)
18
![](https://cdn.adscientificindex.com/logos/6383.jpg)
9
Victor. P. Bagla
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
772
468
0.606
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Medicinal plant research
Veterinary Science
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
768,948
![Sierra Leone](/flags/sl.png)
19
![](https://cdn.adscientificindex.com/logos/6383.jpg)
10
Sheku Alfred Kanu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
756
630
0.833
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Argriculture
Plant Physiology
Biological Nitrogen Fixation
Water Quality Management
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
769,072
![Sierra Leone](/flags/sl.png)
20
![](https://cdn.adscientificindex.com/logos/6383.jpg)
11
Mathew Didlyn Kpundeh|Kpundeh Mathew Didlyn, Kpundeh M.D, Mathew D. Kpundeh
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
756
506
0.669
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Blue Economic diversification in the era of Climate change
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
889,925
![Sierra Leone](/flags/sl.png)
21
![](https://cdn.adscientificindex.com/logos/11375.jpg)
6
Ronnie Frazer-Williams
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
524
263
0.502
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
902,653
![Sierra Leone](/flags/sl.png)
22
![](https://cdn.adscientificindex.com/logos/6383.jpg)
12
Samuel Joseph Bebeley
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
502
335
0.667
![](https://cdn.adscientificindex.com/logos/6383.jpg)
Physical Activity & Public Health
Public Health Nutrition
Health Education Promotion
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
911,658
![Sierra Leone](/flags/sl.png)
23
![](https://cdn.adscientificindex.com/logos/11375.jpg)
7
Edward Hinga Sandy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
487
313
0.643
![](https://cdn.adscientificindex.com/logos/11375.jpg)
Environmental Science and Engineering
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
923,028
![Sierra Leone](/flags/sl.png)
24
![](https://cdn.adscientificindex.com/logos/11159.png)
1
Curtis FJ Doebbler
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
469
167
0.356
![](https://cdn.adscientificindex.com/logos/11159.png)
law
international law
criminal justice
law and society
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
924,571
![Sierra Leone](/flags/sl.png)
25
![](https://cdn.adscientificindex.com/logos/6383.jpg)
13
Alhaji Morlai Bangura
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
466
396
0.850