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@article{DAN_1969_187_3_a8, author = {V. \`E. Lyantse}, title = {The perturbation of a continuous spectrum}, journal = {Doklady Akademii Nauk}, pages = {514--517}, publisher = {mathdoc}, volume = {187}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_187_3_a8/} }
V. È. Lyantse. The perturbation of a continuous spectrum. Doklady Akademii Nauk, Tome 187 (1969) no. 3, pp. 514-517. http://geodesic.mathdoc.fr/item/DAN_1969_187_3_a8/