@article{DE_1987_23_7_a10,
     author = {V. A. Il'in and E. I. Moiseev},
     title = {A nonlocal boundary value problem of the first kind for the {Sturm{\textendash}Liouville} operator in differential and difference interpretations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1198--1207},
     year = {1987},
     volume = {23},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_7_a10/}
}