00544naa#a2200169#i#450# EN\\bibl\42960 20240429072303.1 2500-3372 20210331b2021####ek#y0engy0150####ca RU Rational Managerial Decisions in Business Sector Journal article Kemerovo Kemerovo State University 2021 11 с. Journal article local Статистика. Демография. Социология. 31 Shumkin Evgeny Mihaylovich jcenter.kemsu.ru