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 6 PB Siberian Federal University