00460naa#a2200169#i#450# EN\INFRA-M\bibl\13168 20241218152220.3 2308-4898 20160919b2016####ek#y0engy0150####ca RUS RU Contact Conic Sections Journal article Moscow INFRA-M Academic Publishing LLC. 2016 9 с. Journal article local Korotkiy Viktor Anatol'evich naukaru.ru