00530naa#a2200181#i#450# EN\INFRA-M\bibl\12487 20241224124921.2 2500-0489 20160425b2016####ek#y0engy0150####ca RUS RU Graphical method for determining the area of closed conic Journal article Moscow INFRA-M Academic Publishing LLC. 2016 0 с. Journal article local Beglov I. A. Rustamyan Vyacheslav Volodyaevich naukaru.ru