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
* Total Citation Counts Rankings
Ranking Based On Selection :1
information-related competencies
e-learning
internationalization
digital libraries
information and knowledge management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,557
1,008
0.394
* Total Citation Counts Rankings
Ranking Based On Selection :2
Marketing information services
change management in libraries
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41
9
0.220
* Total Citation Counts Rankings
Ranking Based On Selection :3
Early modern disputations
history of medicine
reception of Greek and Roman literature
onomastics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
40
16
0.400
* Total Citation Counts Rankings
Ranking Based On Selection :4
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34
27
0.794
* Total Citation Counts Rankings
Ranking Based On Selection :5
phonetics
dialects
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13
12
0.923
Sirje Virkus
Tallinn University
Tallinn, Estonia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,557
1,008
0.394
information-related competencies
e-learning
internationalization
digital libraries
information and knowledge management
Aira Lepik
Tallinn University
Tallinn, Estonia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41
9
0.220
Marketing information services
change management in libraries
Kaarina Rein
University of Tartu
Tartu, Estonia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
40
16
0.400
Early modern disputations
history of medicine
reception of Greek and Roman literature
onomastics
Sigrid Mandre
Tallinn University
Tallinn, Estonia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34
27
0.794
Liis Ermus
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13
12
0.923