Citation Rankings
Highly Cited Researchers
University of the Free State Highly Cited Researchers Citation Rankings (Sort by last 6 years Citation Index) 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.
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :1
nanophosphors
luminescence
cathodoluminescence
surface characterization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,267
17,900
0.681
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :2
Physics
Astrophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,510
9,489
0.654
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :3
Water resources management
Water accounting
Water Footprint
Food
Irrigation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,297
9,098
0.408
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :4
Virology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,466
6,937
0.929
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :5
Phytochemistry
Nutraceuticals
Natural Product Research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,199
6,810
0.946
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,250
6,025
0.536
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :7
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,566
5,646
0.860
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :8
Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,542
5,162
0.604
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :9
higher education and development
social justice
development ethics
capability approach
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,607
5,010
0.472
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :10
Biochemistry
Enzymology and Plant Biochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,976
4,754
0.477
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :11
Perovskite solar cell
Organic solar cell
DSSC
Gas Sensors
Materials for Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,113
4,500
0.633
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :12
Organic Chemistry
Nano Science
Clinical Biochemistry
Exosomes
Extracellular Vesicles
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,729
4,249
0.898
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :13
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,184
3,851
0.471
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :14
Food Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,113
3,656
0.598
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :15
Pollen analysis
palaeoscience
palynology
palaeoecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,795
3,606
0.334
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :16
Reliability theory-stochastic modeling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,925
3,366
0.568
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :17
Molecular Virology
Genomics
Next Generation Sequencing
Vaccines
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,450
3,194
0.926
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :18
Stable isotope ecology
Wildlife ecology
Evolutionary ecology
Palaeoecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,229
3,057
0.491
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :19
housing
small towns
mining towns
public health
children
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,101
2,521
0.615
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :20
Condensed Matter Physics
Renewable Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,391
2,434
0.718
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :21
Entrepreneurship
Small Business Management
Entrepreneurial Marketing
Consumer Behaviour
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,510
2,329
0.928
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :22
Entrepreneurship
Business Management
Corporate Financ Operations management
Business polices and problems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,590
2,208
0.853
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :23
Organometallic chemistry
Corrosion
Material Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,849
2,124
0.552
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :24
Phytomedicine
Phytopharmacology
Bioactivity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,123
2,121
0.679
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :25
Agricultural Development Economics and Policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,909
2,013
0.692
* Last 6 Years Citation Counts Rankings
Rankings
15,128
61
1
Ranking Based On Selection: 1
HC Swart
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,267
17,900
0.681
nanophosphors
luminescence
cathodoluminescence
surface characterization
* Last 6 Years Citation Counts Rankings
Rankings
39,595
162
2
Ranking Based On Selection: 2
Petrus Johannes Meintjes
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,510
9,489
0.654
* Last 6 Years Citation Counts Rankings
Rankings
41,912
170
3
Ranking Based On Selection: 3
Ashok Chapagain
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,297
9,098
0.408
Water resources management
Water accounting
Water Footprint
Food
Irrigation
* Last 6 Years Citation Counts Rankings
Rankings
61,580
258
4
Ranking Based On Selection: 4
Dominique Goedhals
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,466
6,937
0.929
* Last 6 Years Citation Counts Rankings
Rankings
63,363
263
5
Ranking Based On Selection: 5
Abhay Prakash Mishra
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,199
6,810
0.946
Phytochemistry
Nutraceuticals
Natural Product Research
* Last 6 Years Citation Counts Rankings
Rankings
74,530
306
6
Ranking Based On Selection: 6
M Gryzenhout
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,250
6,025
0.536
* Last 6 Years Citation Counts Rankings
Rankings
81,214
333
7
Ranking Based On Selection: 7
Diederik J Opperman
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,566
5,646
0.860
* Last 6 Years Citation Counts Rankings
Rankings
90,707
376
8
Ranking Based On Selection: 8
Jeanet Conradie
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,542
5,162
0.604
* Last 6 Years Citation Counts Rankings
Rankings
94,486
393
9
Ranking Based On Selection: 9
Melanie Walker
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,607
5,010
0.472
higher education and development
social justice
development ethics
capability approach
* Last 6 Years Citation Counts Rankings
Rankings
100,856
426
10
Ranking Based On Selection: 10
Mpho Mafa
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,976
4,754
0.477
Biochemistry
Enzymology and Plant Biochemistry
* Last 6 Years Citation Counts Rankings
Rankings
107,739
463
11
Ranking Based On Selection: 11
Vinod Kumar
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,113
4,500
0.633
Perovskite solar cell
Organic solar cell
DSSC
Gas Sensors
Materials for Energy
* Last 6 Years Citation Counts Rankings
Rankings
115,831
505
12
Ranking Based On Selection: 12
Anand Krishnan
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,729
4,249
0.898
Organic Chemistry
Nano Science
Clinical Biochemistry
Exosomes
Extracellular Vesicles
* Last 6 Years Citation Counts Rankings
Rankings
130,203
571
13
Ranking Based On Selection: 13
Felicity Burt
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,184
3,851
0.471
* Last 6 Years Citation Counts Rankings
Rankings
138,430
605
14
Ranking Based On Selection: 14
Arno Hugo
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,113
3,656
0.598
* Last 6 Years Citation Counts Rankings
Rankings
140,676
618
15
Ranking Based On Selection: 15
Louis Scott
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,795
3,606
0.334
Pollen analysis
palaeoscience
palynology
palaeoecology
* Last 6 Years Citation Counts Rankings
Rankings
151,997
673
16
Ranking Based On Selection: 16
Maxim Finkelstein
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,925
3,366
0.568
Reliability theory-stochastic modeling
* Last 6 Years Citation Counts Rankings
Rankings
161,833
717
17
Ranking Based On Selection: 17
Martin Munene Nyaga
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,450
3,194
0.926
Molecular Virology
Genomics
Next Generation Sequencing
Vaccines
* Last 6 Years Citation Counts Rankings
Rankings
169,447
746
18
Ranking Based On Selection: 18
Daryl Codron
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,229
3,057
0.491
Stable isotope ecology
Wildlife ecology
Evolutionary ecology
Palaeoecology
* Last 6 Years Citation Counts Rankings
Rankings
209,090
939
19
Ranking Based On Selection: 19
Lochner Marais
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,101
2,521
0.615
housing
small towns
mining towns
public health
children
* Last 6 Years Citation Counts Rankings
Rankings
217,472
986
20
Ranking Based On Selection: 20
Francis Birhanu Dejene
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,391
2,434
0.718
* Last 6 Years Citation Counts Rankings
Rankings
227,665
1,020
21
Ranking Based On Selection: 21
Eugine Tafadzwa Maziriri.
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,510
2,329
0.928
Entrepreneurship
Small Business Management
Entrepreneurial Marketing
Consumer Behaviour
* Last 6 Years Citation Counts Rankings
Rankings
240,291
1,087
22
Ranking Based On Selection: 22
Neneh Brownhilder
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,590
2,208
0.853
Entrepreneurship
Business Management
Corporate Financ Operations management
Business polices and problems
* Last 6 Years Citation Counts Rankings
Rankings
249,837
1,127
23
Ranking Based On Selection: 23
Sumit Kumar
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,849
2,124
0.552
Organometallic chemistry
Corrosion
Material Chemistry
* Last 6 Years Citation Counts Rankings
Rankings
250,240
1,132
24
Ranking Based On Selection: 24
Tom Ashafa
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,123
2,121
0.679
Phytomedicine
Phytopharmacology
Bioactivity
* Last 6 Years Citation Counts Rankings
Rankings
262,984
1,198
25
Ranking Based On Selection: 25
Edilegnaw Wale
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,909
2,013
0.692
Agricultural Development Economics and Policy