@article{ZNSL_1985_147_a15,
     author = {S. V. Khryashchev},
     title = {On asymptotics of the discrete spectrum of perturbed {Hill's} operator},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {188--189},
     publisher = {mathdoc},
     volume = {147},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1985_147_a15/}
}