%0 Journal Article %A Ya. D. Mamedov %T Cauchy limit problem for first- and second-order differential equations with unbounded nonlinear potential operators %J Doklady Akademii Nauk %D 1965 %P 1239-1242 %V 164 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_164_6_a7/ %G ru %F DAN_1965_164_6_a7