Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 534 Scientists Citation Rankings (Sort by last 6 years Citation Index) - 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.
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 1
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,199
22,437
0.796
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 2
Astrophysics and Astro-particle Physics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,265
11,663
0.639
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 3
Andrology
Oxidative stress
Medicinal Plants
reactive oxygen species
male infertility
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,402
10,589
0.646
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 4
Physics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,474
9,500
0.322
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 5
Nutrtion
Prevention of Non communicable diseases
Obesity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,823
8,595
0.543
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,434
8,370
0.542
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 7
Remote Sensing
Climate Change
Environmental monitoring
Earth Observation
Water accounting.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,618
6,067
0.796
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 8
Conducting Polymers
Electroanalysis
Electrochemical Energy
Nanomaterials
Sensors
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,638
6,049
0.479
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 9
Nanomaterials
Catalysis
Environmental Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,706
5,907
0.609
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 10
metal hydrides
hydrogen energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,033
5,714
0.812
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 11
photovoltaics
nanomaterials
nanophotonics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,296
5,275
0.288
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 12
Cosmology
Radio telescopes
SKA
MeerKAT
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,179
5,069
0.552
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 13
land reform
agriculture
farm workers
land grabbing
redistribution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,749
4,916
0.386
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 14
Posthumanism
Feminist New Materialism
Post-qualitative inquiry
Social Justice and Ethics of Care
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,704
4,702
0.610
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 15
Health systems development and research
Human resource development in the health sector
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,455
3,969
0.420
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 16
Nutrition
Obesity
Prevention of non communicable diseases
community health workers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,768
3,786
0.656
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 17
Geochronology
Economic Geology
Sedimentology
Laser Ablation
LA-ICP-MS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,874
3,433
0.436
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 18
Virology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,376
3,168
0.430
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 19
Nanobiotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,678
3,042
0.827
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 20
HIV and Health Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,661
3,027
0.535
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 21
Heterosexualities
critical masculinities
racialisation of sexuality and gender
gender-based violence
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,587
2,881
0.437
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 22
Epidemiology
Public health
NCDs
HIV/AIDS
Integrative Health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,468
2,807
0.513
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 23
Endocrinology
Immunology
Oxidative Stress
Herbal Medicine
Reproduction
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,797
2,545
0.910
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 24
Family-centred care
Child and family well-being
Parenting
family capability
human capabilities
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,389
2,544
0.751
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 25
obesity
nutrition
non-communicable disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,726
2,514
0.532
* Last 6 Years Citation Counts Rankings
Rankings
9,282
43
1
Ranking Based On Selection: 1
Ehimario U. Igumbor
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,199
22,437
0.796
* Last 6 Years Citation Counts Rankings
Rankings
24,994
100
2
Ranking Based On Selection: 2
Lerothodi L. Leeuw
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,265
11,663
0.639
* Last 6 Years Citation Counts Rankings
Rankings
28,965
117
3
Ranking Based On Selection: 3
Ralf Henkel
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,402
10,589
0.646
Andrology
Oxidative stress
Medicinal Plants
reactive oxygen species
male infertility
* Last 6 Years Citation Counts Rankings
Rankings
34,083
141
4
Ranking Based On Selection: 4
Roy Maartens
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,474
9,500
0.322
* Last 6 Years Citation Counts Rankings
Rankings
39,444
159
5
Ranking Based On Selection: 5
Thandi Puoane
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,823
8,595
0.543
Nutrtion
Prevention of Non communicable diseases
Obesity
* Last 6 Years Citation Counts Rankings
Rankings
40,988
170
6
Ranking Based On Selection: 6
Mary Kinney
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,434
8,370
0.542
* Last 6 Years Citation Counts Rankings
Rankings
64,319
263
7
Ranking Based On Selection: 7
Timothy Dube
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,618
6,067
0.796
Remote Sensing
Climate Change
Environmental monitoring
Earth Observation
Water accounting.
* Last 6 Years Citation Counts Rankings
Rankings
64,603
265
8
Ranking Based On Selection: 8
Emmanuel Iwuoha
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,638
6,049
0.479
Conducting Polymers
Electroanalysis
Electrochemical Energy
Nanomaterials
Sensors
* Last 6 Years Citation Counts Rankings
Rankings
66,801
273
9
Ranking Based On Selection: 9
Leslie Petrik
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,706
5,907
0.609
Nanomaterials
Catalysis
Environmental Chemistry
* Last 6 Years Citation Counts Rankings
Rankings
69,890
290
10
Ranking Based On Selection: 10
Mykhaylo Lototskyy
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,033
5,714
0.812
* Last 6 Years Citation Counts Rankings
Rankings
77,828
314
11
Ranking Based On Selection: 11
Ruud Schropp
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,296
5,275
0.288
photovoltaics
nanomaterials
nanophotonics
* Last 6 Years Citation Counts Rankings
Rankings
81,925
334
12
Ranking Based On Selection: 12
Mario G. Santos
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,179
5,069
0.552
* Last 6 Years Citation Counts Rankings
Rankings
85,247
349
13
Ranking Based On Selection: 13
Ruth Hall
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,749
4,916
0.386
land reform
agriculture
farm workers
land grabbing
redistribution
* Last 6 Years Citation Counts Rankings
Rankings
90,279
369
14
Ranking Based On Selection: 14
Vivienne Bozalek
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,704
4,702
0.610
Posthumanism
Feminist New Materialism
Post-qualitative inquiry
Social Justice and Ethics of Care
* Last 6 Years Citation Counts Rankings
Rankings
111,514
475
15
Ranking Based On Selection: 15
Uta Lehmann
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,455
3,969
0.420
Health systems development and research
Human resource development in the health sector
* Last 6 Years Citation Counts Rankings
Rankings
117,965
503
16
Ranking Based On Selection: 16
Tsolekile
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,768
3,786
0.656
Nutrition
Obesity
Prevention of non communicable diseases
community health workers
* Last 6 Years Citation Counts Rankings
Rankings
132,699
581
17
Ranking Based On Selection: 17
Dirk Frei (Né Landwehr)|Dirk Landwehr
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,874
3,433
0.436
Geochronology
Economic Geology
Sedimentology
Laser Ablation
LA-ICP-MS
* Last 6 Years Citation Counts Rankings
Rankings
145,802
633
18
Ranking Based On Selection: 18
Megan L. Shaw
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,376
3,168
0.430
* Last 6 Years Citation Counts Rankings
Rankings
152,838
669
19
Ranking Based On Selection: 19
Mervin Meyer
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,678
3,042
0.827
* Last 6 Years Citation Counts Rankings
Rankings
153,712
673
20
Ranking Based On Selection: 20
Brian Van Wyk
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,661
3,027
0.535
* Last 6 Years Citation Counts Rankings
Rankings
162,499
708
21
Ranking Based On Selection: 21
Tamara Shefer
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,587
2,881
0.437
Heterosexualities
critical masculinities
racialisation of sexuality and gender
gender-based violence
* Last 6 Years Citation Counts Rankings
Rankings
167,449
729
22
Ranking Based On Selection: 22
Gail Hughes
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,468
2,807
0.513
Epidemiology
Public health
NCDs
HIV/AIDS
Integrative Health
* Last 6 Years Citation Counts Rankings
Rankings
186,634
816
23
Ranking Based On Selection: 23
Kristian Leisegang
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,797
2,545
0.910
Endocrinology
Immunology
Oxidative Stress
Herbal Medicine
Reproduction
* Last 6 Years Citation Counts Rankings
Rankings
186,708
817
24
Ranking Based On Selection: 24
Nicolette V Roman
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,389
2,544
0.751
Family-centred care
Child and family well-being
Parenting
family capability
human capabilities
* Last 6 Years Citation Counts Rankings
Rankings
189,090
825
25
Ranking Based On Selection: 25
Zandile Mchiza
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,726
2,514
0.532
obesity
nutrition
non-communicable disease