00597naa#a2200217#i#450# EN\\bibl\74662 20241122201209.5 2413-046X 20181025b2018####ek#y0engy0150####ca ENG RU Journal article Moscow Electronic science 2018 0 с. Journal article local . 339.54.012+338.001.36 ENG Vershinin Valentin Valentinovich Kovaleva Tat'yana Nikolaevna Demidova Marina Mihaylovna Lebedev Petr Petrovich e-integral.ru