%0 Journal Article %A R. I. Kachurovskii %T Generalization of the Fredholm theorems and of theorems on linear operators with closed range to some classes of nonlinear operators %J Doklady Akademii Nauk %D 1971 %P 520-523 %V 197 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1971_197_3_a3/ %G ru %F DAN_1971_197_3_a3