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@article{DAN_1977_234_1_a3, author = {B. M. Levitan}, title = {On the solvability of the inverse {Sturm--Liouville} problem on the entire line}, journal = {Doklady Akademii Nauk}, pages = {22--25}, publisher = {mathdoc}, volume = {234}, number = {1}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_234_1_a3/} }
B. M. Levitan. On the solvability of the inverse Sturm--Liouville problem on the entire line. Doklady Akademii Nauk, Tome 234 (1977) no. 1, pp. 22-25. http://geodesic.mathdoc.fr/item/DAN_1977_234_1_a3/