@article{DE_1999_35_8_a7,
     author = {A. S. Makin},
     title = {On a class of boundary value problems for the {Sturm{\textendash}Liouville} operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1058--1066},
     year = {1999},
     volume = {35},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_8_a7/}
}