@article{DAN_1979_244_4_a3,
     author = {I. V. Emelin and M. A. Krasnosel'skii},
     title = {On the theory of ill-posed problems},
     journal = {Doklady Akademii Nauk},
     pages = {805--808},
     publisher = {mathdoc},
     volume = {244},
     number = {4},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_244_4_a3/}
}