@article{DAN_1971_197_3_a3,
     author = {R. I. Kachurovskii},
     title = {Generalization of the {Fredholm} theorems and of theorems on linear operators with closed range to some classes of nonlinear operators},
     journal = {Doklady Akademii Nauk},
     pages = {520--523},
     publisher = {mathdoc},
     volume = {197},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_197_3_a3/}
}