Citation Rankings
Highly Cited Researchers
Africa Law / Environmental Law Highly Cited Researchers 63 Scientists Citation Rankings - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Environmental law
environmental rights
environmental constitutionalism
Anthropocene
earth syste
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,444
3,362
0.757
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* Total Citation Counts Rankings
Ranking Based On Selection: 2
Law
Environmental law
Property Law
Gende
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,856
1,199
0.311
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Climate Change and Environmental Diplomacy
Environmental Law and Policy
Development Politic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,326
1,278
0.964
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Environmental Law
Marine Law
Climate Law
Energy La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
851
250
0.294
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Environmental law
Legal History
Land Law
Legal Pluralis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
772
286
0.370
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Intellectual Property Law
Environmental Law
Banking Law and Legal Methods
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
632
294
0.465
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Environmental La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
542
64
0.118
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Environmental law and Sustainability
Energy and Climate change
Extractive industries
Water la
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
485
254
0.524
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Environmental Contamination
Environmental Law
Environmental Chemistry
Wastewater treatmen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
406
299
0.736
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
International environmental la
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
379
223
0.588
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Environmental management
environmental law
environmental auditing and verification
environmental management systems
environ
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
361
258
0.715
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Environmental La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
267
169
0.633
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Environmental Law
Biotechnology law
Traditional Knowledge and Patent Syste
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
234
123
0.526
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Environmental Law and Governance
Natural Resource Management
Human Rights La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
196
156
0.796
* Total Citation Counts Rankings
Ranking Based On Selection: 15
International Environmental Law
Human Rights
Energy & Natural Resources
Company La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
152
76
0.500
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Law generally. Natural Resources
Energy and Environmental Law and Policy
in particula
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
137
62
0.453
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Environmental Law
Sustainable Development
Natural Resources Law
Indigenous Ecological Knowledg
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
85
84
0.988
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Aviation nmenvironmental law& legal research metho
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
68
47
0.691
* Total Citation Counts Rankings
Ranking Based On Selection: 19
law
environmental law
property la
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
68
14
0.206
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Environmental Science
Environmental Management
Environmental La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
65
48
0.738
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Energy Law
Taxation Law
Environmental Law
International Investment La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
63
63
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Environmental Law
Human Rights La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
63
62
0.984
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Law of Banking
Environmental Law and Oil and Gas La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61
46
0.754
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Petroleum law Environmental law
Labour law
Customary Law and Family La
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
60
42
0.700
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Environmental Law
Climate Law
Judicial Impac
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48
48
1.000
* Total Citation Counts Rankings
Rankings
243,019
1,014
42
Ranking Based On Selection: 1
Louis J. Kotzé
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,444
3,362
0.757
Environmental law
environmental rights
environmental constitutionalism
Anthropocene
earth syste
* Total Citation Counts Rankings
Rankings
276,348
138
37
Ranking Based On Selection: 2
Patricia Kameri-Mbote
University of Nairobi
Nairobi, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,856
1,199
0.311
* Total Citation Counts Rankings
Rankings
604,096
420
133
Ranking Based On Selection: 3
Musah-Surugu Issah Justice
University of Ghana
Legon, Ghana
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,326
1,278
0.964
Climate Change and Environmental Diplomacy
Environmental Law and Policy
Development Politic
* Total Citation Counts Rankings
Rankings
763,625
3,955
624
Ranking Based On Selection: 4
Jan Glazewski
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
851
250
0.294
Environmental Law
Marine Law
Climate Law
Energy La
* Total Citation Counts Rankings
Rankings
797,825
4,185
226
Ranking Based On Selection: 5
Willemien Du Plessis
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
772
286
0.370
Environmental law
Legal History
Land Law
Legal Pluralis
* Total Citation Counts Rankings
Rankings
867,475
5,066
183
Ranking Based On Selection: 6
Sopuru Christian
Obafemi Awolowo University
Ile Ife, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
632
294
0.465
Intellectual Property Law
Environmental Law
Banking Law and Legal Methods
* Total Citation Counts Rankings
Rankings
924,912
1,141
356
Ranking Based On Selection: 7
Charles Odidi Okidi
University of Nairobi
Nairobi, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
542
64
0.118
* Total Citation Counts Rankings
Rankings
971,366
5,397
534
Ranking Based On Selection: 8
Tumai Murombo
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
485
254
0.524
Environmental law and Sustainability
Energy and Climate change
Extractive industries
Water la
* Total Citation Counts Rankings
Rankings
1,045,169
6,035
98
Ranking Based On Selection: 9
Jbn Mudumbi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
406
299
0.736
Environmental Contamination
Environmental Law
Environmental Chemistry
Wastewater treatmen
* Total Citation Counts Rankings
Rankings
1,074,100
6,273
206
Ranking Based On Selection: 10
Werner Scholtz
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
379
223
0.588
Smart Institutional Plan
Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.
* Total Citation Counts Rankings
Rankings
1,094,300
6,442
345
Ranking Based On Selection: 11
Jan-Albert Wessels
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
361
258
0.715
Environmental management
environmental law
environmental auditing and verification
environmental management systems
environ
* Total Citation Counts Rankings
Rankings
1,228,390
12,109
514
Ranking Based On Selection: 12
Ijaiya Hakeem
University of Ilorin
Ilorin, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
267
169
0.633
* Total Citation Counts Rankings
Rankings
1,291,312
13,416
249
Ranking Based On Selection: 13
Emeka Polycarp Amechi
University of Port Harcourt
Port Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
234
123
0.526
Environmental Law
Biotechnology law
Traditional Knowledge and Patent Syste
* Total Citation Counts Rankings
Rankings
1,379,289
15,219
294
Ranking Based On Selection: 14
Uzuazo Etemire
University of Port Harcourt
Port Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
196
156
0.796
Environmental Law and Governance
Natural Resource Management
Human Rights La
* Total Citation Counts Rankings
Rankings
1,513,627
17,950
553
Ranking Based On Selection: 15
Oluwatoyin O. Ajayi
Obafemi Awolowo University
Ile Ife, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
152
76
0.500
International Environmental Law
Human Rights
Energy & Natural Resources
Company La
* Total Citation Counts Rankings
Rankings
1,567,221
19,128
364
Ranking Based On Selection: 16
Ibibia Lucky Worika
University of Port Harcourt
Port Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
137
62
0.453
Law generally. Natural Resources
Energy and Environmental Law and Policy
in particula
* Total Citation Counts Rankings
Rankings
1,798,920
24,304
842
Ranking Based On Selection: 17
Gbadegesin Opeyemi Adewale
University of Ibadan
Ibadan, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
85
84
0.988
Environmental Law
Sustainable Development
Natural Resources Law
Indigenous Ecological Knowledg
* Total Citation Counts Rankings
Rankings
1,901,951
26,719
906
Ranking Based On Selection: 18
Murtala Ganiyu Abdul Murgan
University of Ilorin
Ilorin, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
68
47
0.691
Aviation nmenvironmental law& legal research metho
* Total Citation Counts Rankings
Rankings
1,903,669
26,775
108
Ranking Based On Selection: 19
Ambrose Ekpu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
68
14
0.206
* Total Citation Counts Rankings
Rankings
1,921,155
13,132
1,271
Ranking Based On Selection: 20
Bambo Dubula
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
65
48
0.738
Environmental Science
Environmental Management
Environmental La
* Total Citation Counts Rankings
Rankings
1,931,369
27,462
146
Ranking Based On Selection: 21
Eti Best Herbert
Bowen University
Iwo, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
63
63
1.000
Energy Law
Taxation Law
Environmental Law
International Investment La
* Total Citation Counts Rankings
Rankings
1,932,270
27,481
147
Ranking Based On Selection: 22
Empire Hechime Nyekwere
Bowen University
Iwo, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
63
62
0.984
* Total Citation Counts Rankings
Rankings
1,948,052
27,893
486
Ranking Based On Selection: 23
Uwem Udok
University of Uyo
Uyo, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61
46
0.754
Law of Banking
Environmental Law and Oil and Gas La
* Total Citation Counts Rankings
Rankings
1,955,245
28,090
453
Ranking Based On Selection: 24
Omerionwan Edu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
60
42
0.700
Petroleum law Environmental law
Labour law
Customary Law and Family La
* Total Citation Counts Rankings
Rankings
2,038,830
14,164
1,254
Ranking Based On Selection: 25
Jenny Hall
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48
48
1.000
Environmental Law
Climate Law
Judicial Impac