@article{DE_1969_5_5_a21,
     author = {S. S. Krickaya},
     title = {Asymptotic formulae for the eigenvalues and eigenfunctions of a {Sturm--Liouville} type problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {967--970},
     publisher = {mathdoc},
     volume = {5},
     number = {5},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_5_a21/}
}