@article{DE_1987_23_8_a16,
     author = {V. A. Il'in and E. I. Moiseev},
     title = {A nonlocal boundary value problem of the second kind for the {Sturm{\textendash}Liouville} operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1422--1431},
     year = {1987},
     volume = {23},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_8_a16/}
}