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
environmental chemistry
pesticides
analytical chemistry
emergent contaminants
occupacional hygiene
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,030
1,274
0.420
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :2
Environmental Analytical Chemistry
Stable Isotopes
Ecohydrology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
942
816
0.866
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :3
Química
Productos Natural
LCMS
GCMS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
616
538
0.873
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :4
Asphalt
materials science
adhesion
interfaces
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
515
435
0.845
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :5
liquid crystals
sol-gel
optical materials
porous materials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
405
287
0.709
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :6
Analytical Chemistry
Chemical Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
351
230
0.655
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :7
Geochemistry
vulcanology
ecotoxicology
environmental sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
256
68
0.266
Clemens Ruepert
Universidad Nacional Costa Rica
Sasn Pedro, Costa Rica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,030
1,274
0.420
environmental chemistry
pesticides
analytical chemistry
emergent contaminants
occupacional hygiene
Germain Esquivel Hernández
Universidad Nacional Costa Rica
Sasn Pedro, Costa Rica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
942
816
0.866
Environmental Analytical Chemistry
Stable Isotopes
Ecohydrology
Victor Vasquez
Universidad Nacional Costa Rica
Sasn Pedro, Costa Rica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
616
538
0.873
Química
Productos Natural
LCMS
GCMS
Alejandra Baldi
Universidad Nacional Costa Rica
Sasn Pedro, Costa Rica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
515
435
0.845
Asphalt
materials science
adhesion
interfaces
Erick Castellón
Universidad Nacional Costa Rica
Sasn Pedro, Costa Rica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
405
287
0.709
liquid crystals
sol-gel
optical materials
porous materials
Julio Otarola
Universidad Nacional Costa Rica
Sasn Pedro, Costa Rica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
351
230
0.655
Analytical Chemistry
Chemical Ecology
Jairo García-Céspedes
Universidad Nacional Costa Rica
Sasn Pedro, Costa Rica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
256
68
0.266
Geochemistry
vulcanology
ecotoxicology
environmental sciences