@article{DAN_1960_135_6_a6,
     author = {V. F. Zhdanovich},
     title = {Asymptotic expansions of the eigenvalues of a boundary value problem with a parameter},
     journal = {Doklady Akademii Nauk},
     pages = {1318--1321},
     publisher = {mathdoc},
     volume = {135},
     number = {6},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_135_6_a6/}
}