00607naa#a2200193#i#4500001002200000003001700022005001700039011001400056100004100070101000800111102000700119200009200126210005100218215001100269608002700280675003400307700003300341856003900374EN\INFRA-M\bibl\17349/en/manage/index20250409124317.3##a2308-4898##a20170704b2017####ek#y0engy0150####ca0#aRUS##aRU1#aConics As Sections of Quadrics by Plane (Generalized Dandelin Theorem)eJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2017##a13 с.##aJournal article2local##aМатематика. 51zRUS#1aKheyfetsgAleksandr L'vovich4#atest.editorum.ruu/en/manage/index