@article{DE_1969_5_11_a14,
     author = {V. S. Mokeichev},
     title = {Periodic boundary value problems for certain differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2087--2092},
     publisher = {mathdoc},
     volume = {5},
     number = {11},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_11_a14/}
}