TY JOUR TI MODERN APPROACHES TO CUSTOMER SERVICE USING DIGITAL TECHNOLOGY KW retail KW trade services KW digital technologies KW digital transformation KW omnichannel KW personalization KW self-service cash registers KW customer experience KW automation KW and customer focus JO Trade, service, food industry AU Podachina, L.I. AU Aleksandrenko, N.A. AU Nikolaeva, V.A. PY 2026 IS PB Siberian Federal University