@article{DE_1988_24_4_a5,
     author = {R. Oinarov and M. Otelbaev},
     title = {A criterion for the discreteness of the spectrum of the general {Sturm--Liouville} operator, and embedding theorems connected with it},
     journal = {Differencialʹnye uravneni\^a},
     pages = {584--591},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_4_a5/}
}