@article{DE_1986_22_3_a0,
     author = {S. A. Brykalov},
     title = {Existence of solutions of certain boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {371--378},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_3_a0/}
}