@article{MMO_1986_49_a7,
     author = {D. G. Vasil'ev},
     title = {Asymptotic behavior of the spectrum of a~boundary value problem},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {167--237},
     publisher = {mathdoc},
     volume = {49},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1986_49_a7/}
}