@article{DE_1993_29_1_a17,
     author = {A. F. Ulitko and A. G. Kiselevskii and L. Shorfi},
     title = {Distribution of the eigenvalues of the {Sturm--Liouville} operator in the {Dirichlet} problem for a truncated wedge},
     journal = {Differencialʹnye uravneni\^a},
     pages = {139--144},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_1_a17/}
}