00568naa#a2200193#i#450# EN\INFRA-M\bibl\6507 /en/manage/index 20250116091253.4 2308-4898 20150610b2015####ek#y0engy0150####ca RUS RU About the Tasks of Descriptive Geometry With Imaginary Solutions Journal article Moscow INFRA-M Academic Publishing LLC. 2015 5 с. Journal article local Ivanov G. Dmitrieva I. M. fht.editorum.ru /en/manage/index