@article{DAN_1961_140_5_a10,
     author = {L. S. Rakovshchik},
     title = {Some propositions on regularization of linear operators in {Banach} spaces},
     journal = {Doklady Akademii Nauk},
     pages = {1023--1025},
     year = {1961},
     volume = {140},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_140_5_a10/}
}