00508naa#a2200181#i#450# EN\INFRA-M\bibl\409 20210420174131.2 2308-4898 20130725b2013####ek#y0engy0150####ca RUS RU Overview of computer technologies used in descriptive geometry teaching Article Moscow INFRA-M Academic Publishing LLC. 2013 4 с. Article local Vavanov D. Ivashchenko A. riorpub.com