LDR 00448naa#a2200169#i#450# 001 EN\INFRA-M\bibl\271 005 20241212171206.4 011 ## _a2308-4898 100 ## _a20130603b2013####ek#y0engy0150####ca 101 0# _aRUS 102 ## _aRU 200 1# _aEllipse: tangent and normal _eJournal article 210 1# _aMoscow _cINFRA-M Academic Publishing LLC. _d2013 215 ## _a2 с. 608 ## _aJournal article _2local 700 #1 _aSal'kov _gN. A. 856 4# _anaukaru.ru _u