LDR 00451naa#a2200169#i#450# 001 EN\INFRA-M\bibl\14083 005 20241219065102.4 011 ## _a2308-4898 100 ## _a20161219b2016####ek#y0engy0150####ca 101 0# _aRUS 102 ## _aRU 200 1# _aEnvelope of a Family of Curves _eJournal article 210 1# _aMoscow _cINFRA-M Academic Publishing LLC. _d2016 215 ## _a4 с. 608 ## _aJournal article _2local 700 #1 _aGirsh _gA. G. 856 4# _anaukaru.ru _u