TY JOUR TI Development of Media Holding in the Context of the Dual Media Services Market Formation KW media industry KW dual media market KW media product KW online advertising KW media holding KW e-commerce JO Bulletin of Kemerovo State University. Series: Political, Sociological and Economic sciences AU Gorelkina, A.V. PY 2024 IS 9 PB Kemerovo State University