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@article{DAN_1962_147_5_a9, author = {N. V. Marchenko}, title = {On the extension of an operator and the existence of fixed points}, journal = {Doklady Akademii Nauk}, pages = {1026--1028}, publisher = {mathdoc}, volume = {147}, number = {5}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_147_5_a9/} }
N. V. Marchenko. On the extension of an operator and the existence of fixed points. Doklady Akademii Nauk, Tome 147 (1962) no. 5, pp. 1026-1028. http://geodesic.mathdoc.fr/item/DAN_1962_147_5_a9/