TY JOUR TI Principles of forming and assessing the effectiveness of purchase logistics in the non-production sector KW non-production sector KW service KW procurement logistics KW logistics technologies KW principles KW efficiency assessment JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Tret'yak, S.N. AU Zenkova, T.Y. AU Lukashova, O.A. PY 2025 IS 0 PB ITBO University