00459naa#a2200181#i#450# EN\\bibl\74839 20250109174414.4 2413-046X 20190125b2019####ek#y0engy0150####ca ENG RU Journal article Moscow Electronic science 2019 0 с. Journal article local Ivanov Andrey Vladimirovich Barkan Mihail Shmerovich e-integral.ru