Dr. George Pantazopoulos has been included in the top-cited scientists career-long and single recent year lists, based on the statistical analysis of bibliometric indicators from Scopus database.
Especially, the c-score bibliometric index focuses on impact (i.e. citations) rather than productivity (i.e. number of publications) and it also incorporates information concerning co-authorship and author positions (i.e. single, first, last author). The classification contains 22 scientific fields and 174 sub-fields. More specifically, the calculation was performed using all Scopus author profiles as of October 1st, 2023.
For more information, please read the relevant article:

October 2023 data-update for “Updated science-wide author databases of standardized citation indicators” – Elsevier BV (digitalcommonsdata.com)