00581naa#a2200169#i#450# EN\\bibl\3924 20250129214850.3 2308-8877 20141113b2014####ek#y0engy0150####ca RUS RU Notion of centrality of a social graph vertex and its calculation algorithm Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2014 2 с. Journal article local Boriskin A. anni.editorum.ru