The Sombor index (SO) is a vertex–degree–based graph invariant, invented
in the Summer of 2020, and made publicly available in early 2021. In less than one year, a
remarkable number (almost fifty) research papers on this topological index were produced.
In the present article, we summarize the results achieved so far, and offer a few more.Bulletin t. 153 de l'Académie serbe des sciences et des arts. Classe des sciences mathématiques et naturelles. Sciences mathematiques no 45
