00537naa#a2200169#i#450# EN\\bibl\120435 20260426101837.7 2782-4586 20260331b2026####ek#y0engy0150####ca RU Digitalization of procurement outsourcing in the Russian Federation: realities and prospects Journal article Moscow ITBO University 2026 5 с. Journal article local Управление экономикой. 338.24 Levkina A. S. jomeam.ru