00861nam0 2200241 450 00001936520081117104242.020081117d1977----km-y0itay50------baengrusSUy-------001yyDifferential equations and the calcolus of variationsL. Elsgotstraslated from the russian by George YankovskyMoscaMir1977440 p.21 cmDifferencial'nye uravnenija i variacionnoe iscislenie<in inglese>34011Equazioni differenzali515.318Calcolo differenzialeElsgolc,Lev Ernestovic447993ITUNIPARTHENOPE20081117RICAUNIMARC000019365M 515.3/2M 246DSA2008Differencial'nye uravnenija i variacionnoe iscislenie34011UNIPARTHENOPE