00482naa#a2200169#i#450# EN\INFRA-M\bibl\44890 20241019210922.6 2308-4898 20210722b2021####ek#y0engy0150####ca RU Intersection Operation on a Complex Plane Journal article Moscow INFRA-M Academic Publishing LLC. 2021 8 с. Journal article local Математика. 51 Girsh A. G. zh-szf.ru