01030nam--2200337---450-99000324973020331620090521094122.0000324973USA01000324973(ALEPH)000324973USA0100032497320090521d1977----km-y0itay50------baengSU||||||||001yyDifferential equations and the calculus of variationsL. Elsgoltstranslated from the russian by George YankovskyMoscowMir publishers1977440 p.21 cmRipr. facs. dell'ed. del 1970Equazioni differenziali515.35ELSGOLTS,L.604283YANKOVSKY,GeorgeITsalbcISBD990003249730203316515.35 ELS3813/CBS515.3500220678BKSCIRSIAV79020090521USA010941Differential equations and the calculus of variations1119723UNISA