000 00423nam a2200145Ia 4500
008 170207s9999 xx 000 0 und d
082 _aPG 515.35 ELS-D
100 _aElsgolts, L; Yankovsky, George, Tr.
245 _aDifferential equations and calculus of variations
260 _bMir Publishers, Moscow
260 _c1980
300 _a440
650 _aDifferential equations; Analysis; Mathematics
942 _cBOOKS
999 _c25166
_d25166