00568naa#a2200193#i#450# EN\INFRA-M\bibl\19052 20240427014948.6 2308-4898 20171213b2017####ek#y0engy0150####ca RUS RU “Flipping” Course of Engineering Geometry and Computer Graphics Journal article Moscow INFRA-M Academic Publishing LLC. 2017 15 с. Journal article local Математика. 51 RUS Voronina M. V. Moroz O. N. riorpub.com