00470naa#a2200169#i#450# EN\INFRA-M\bibl\42399 20241218184855.3 2308-4898 20201230b2020####ek#y0engy0150####ca RU Circles on the Complex Plane Journal article Moscow INFRA-M Academic Publishing LLC. 2020 9 с. Journal article local Математика. 51 Girsh A. G. naukaru.ru