00500naa#a2200205#i#450# EN\\bibl\74545 20241129032204.5 2413-046X 20180225b2018####ek#y0engy0150####ca ENG RU Journal article Moscow Electronic science 2018 0 с. Journal article local . 69.005.2 ENG Sergeeva N. D. Kovalev S. A. Levkovich V. V. e-integral.ru