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.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
International Taxation
Tax Law
Tax Policy
Legal History
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
313
166
0.530
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Income Tax Law
Value Added Tax
International Tax
Cyber Law
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
70
50
0.714
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Tax Law
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31
28
0.903
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Tax Law
Competition Law
Internet Law
Investment Law and Human Rights Law
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27
22
0.815
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Tax law
Psychology
Languages
Literature
Mathematics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2
1
0.500
Johann Hattingh
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
313
166
0.530
Sp Van Zyl
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
70
50
0.714
Income Tax Law
Value Added Tax
International Tax
Cyber Law
Carika Keulder Fritz
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31
28
0.903
Tinashe Kondo
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27
22
0.815
Tax Law
Competition Law
Internet Law
Investment Law and Human Rights Law
Liezl Zwart
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2
1
0.500