00580naa#a2200193#i#4500001002200000003001700022005001700039011001400056100004100070101000800111102000700119200008000126210005100206215001100257608002700268675003400295700001900329856003800348EN\INFRA-M\bibl\29909/en/manage/index20251221054359.7##a2308-4898##a20190815b2019####ek#y0engy0150####ca0#aRUS##aRU1#aGeneral Principles for Formation of Ruled Surfaces. Part 3eJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2019##a14 с.##aJournal article2local##aМатематика. 51zRUS#1aSal'kovgN. A.4#afht.editorum.ruu/en/manage/index