00509naa#a2200193#i#450# EN\\bibl\74718 20250718204703.5 2413-046X 20181125b2018####ek#y0engy0150####ca ENG RU Journal article Moscow Electronic science 2018 0 с. Journal article local Aygumov Timur Gadzhievich Melehin Vladimir Borisovich Emirova Guri Abduragimovna stolypinvestnik.ru