TY JOUR TI Virtual Tools for Managing the Rating Promotion of Universities KW international university rankings KW Webometrics ranking KW higher education system KW university network activity KW university website KW Webometrics indicators KW social media KW engagement level KW rating promotion JO Scientific Research and Development. Economics of the Firm AU Timoshenko, G.A. PY 2021 IS 10 PB INFRA-M Academic Publishing LLC.