@article{DAN_1977_235_3_a5,
     author = {B. M. Levitan},
     title = {On the solvability of the inverse {Sturm--Liouville} problem on the whole axis in the case of an infinite number of lacunas in the spectrum},
     journal = {Doklady Akademii Nauk},
     pages = {523--526},
     publisher = {mathdoc},
     volume = {235},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_235_3_a5/}
}