00512naa#a2200181#i#450# EN\INFRA-M\bibl\13168 /en/manage/index 20250519063333.1 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 fht.editorum.ru /en/manage/index