TY JOUR TI CONCEPTUAL FOUNDATIONS OF THE SERVICE PARADIGM OF CUSTOMS ADMINISTRATION IN THE SYSTEM OF ECONOMIC SECURITY KW customs administration KW service paradigm KW customer orientation KW customs services KW risk management KW risk-based approach KW compliance KW digital transformation KW post-clearance control/audit KW economic security KW transaction costs KW supply chain resilience JO Russian Journal of Management AU Fal'chenko, O.D. AU Stremousova, E.G. PY 2026 IS 14 PB Publishing Center RIOR