00449naa#a2200181#i#450# EN\\bibl\74349 20241122130005.5 2413-046X 20170825b2017####ek#y0engy0150####ca ENG RU Journal article Moscow Electronic science 2017 0 с. Journal article local . 63:338.43:025.4.025 ENG Urbanskaya G. G. e-integral.ru