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@article{DAN_1975_222_6_a5, author = {V. A. Marchenko and I. V. Ostrovskii}, title = {A characterization of the spectrum of {Hill{\textquoteright}s} operator}, journal = {Doklady Akademii Nauk}, pages = {1283--1286}, publisher = {mathdoc}, volume = {222}, number = {6}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1975_222_6_a5/} }
V. A. Marchenko; I. V. Ostrovskii. A characterization of the spectrum of Hill’s operator. Doklady Akademii Nauk, Tome 222 (1975) no. 6, pp. 1283-1286. http://geodesic.mathdoc.fr/item/DAN_1975_222_6_a5/