00471naa#a2200169#i#450# EN\INFRA-M\bibl\13167 20241218140308.3 2308-4898 20160919b2016####ek#y0engy0150####ca RUS RU An Infinite Sequence of Mutually Related Circles Journal article Moscow INFRA-M Academic Publishing LLC. 2016 6 с. Journal article local Arakelyan A. naukaru.ru