Two BSIRG researchers, Mário Berberan-Santos and Carina Crucho, are among the most cited top scientists at the top 2% of their areas (ca. 100,000 worldwide, out of more than 6,000,000 scientists worldwide). The rankings are based upon a researcher's citations for both a single year (2017) and cumulative across their careers. Portugal is represented in these lists compiled by Stanford University (published Oct. 2020) with 385 scientists (career list) and 552 scientists (single-year list). Titled Updated science-wide author databases of standardized citation indicators, the lists use algorithms that quantify and systematically rank individuals into consistent scientific fields. The scores are provided with and without self-citations to lessen the impact of self-citations or the use of citation farms (small clusters of researchers massively citing each other's work). Ranked within the careerlong citation impact list is Mario Berberan-Santos (top 1%), also along with Carina Crucho (top 2%) in the single-year citations list.