@article{DE_1979_15_1_a18,
     author = {A. Hasanov},
     title = {Problems with nonlocal boundary conditions for a class of equations of mixed type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {153--158},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_1_a18/}
}