TY JOUR TI Digital transformation of management system of institutions of additional education of schoolchildren KW digital transformation KW digitalization KW institution of additional education of schoolchildren KW strategic management KW procedural model KW information system of management KW information management KW management models JO Vestnik of Astrakhan State Technical University. Series: Economics AU Petruk, G.. AU Shashlo, N.. PY 2021 IS PB Astrakhan State Technical University