00612naa#a2200205#i#450# EN\INFRA-M\bibl\22480 20210420225643.2 2308-4898 20180821b2018####ek#y0engy0150####ca RUS RU On Application of Transformations at Descriptive Geometry’s Problems Solution Article Moscow INFRA-M Academic Publishing LLC. 2018 6 с. Article local Математика. 51 RUS Borovikov Ivan F. Ivanov Gennadiy Sergeevich Surkova N. G. riorpub.com