00501naa#a2200193#i#450# EN\\bibl\74886 20241123144052.6 2413-046X 20190325b2019####ek#y0engy0150####ca ENG RU Journal article Moscow Electronic science 2019 0 с. Journal article local . 334.012.6 / 338.24 ENG Rudenko Lyudmila Gennad'evna Bykova Ol'ga Nikolaevna e-integral.ru