@article{DE_1987_23_1_a15,
     author = {Ya. Sh. Salimov},
     title = {On the {Riesz} means for root function expansions of certain nonlocal boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {155--160},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_1_a15/}
}