Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: 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
Biological water and wastewater Treatment
Bio-energy recovery
Application of nanoparticles
Environmental conservation and sustainability
Climate change and adaptation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
620
504
0.813
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :2
Analytical chemistry
Environmental science/chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27
25
0.926
John Justo Ambuchi
Rongo University
Rongo, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
620
504
0.813
Biological water and wastewater Treatment
Bio-energy recovery
Application of nanoparticles
Environmental conservation and sustainability
Climate change and adaptation
Francis Ongachi Olal
Rongo University
Rongo, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27
25
0.926
Analytical chemistry
Environmental science/chemistry