00451naa#a2200181#i#450# EN\\bibl\74198 20241125185023.1 2413-046X 20170325b2017####ek#y0engy0150####ca ENG RU Journal article Moscow Electronic science 2017 0 с. Journal article local . 631.1 (574) ENG Abzalbek Meruert Saparkyzy e-integral.ru