TY JOUR TI The Specifics of Promoting Additional Educational Services in the Era of Digitalization KW professional development KW comparative analysis KW lead generation JO Scientific Research and Development. Socio-Humanitarian Research and Technology AU Moiseeva, O.A. AU Filippova, O.A. AU Sadkovaya, A.N. AU Moiseev, E.A. PY 2021 IS 10 PB INFRA-M Academic Publishing LLC.