@article{DAN_1994_335_3_a6,
     author = {O. A. Repin},
     title = {A nonlocal boundary value problem for a degenerate hyperbolic},
     journal = {Doklady Akademii Nauk},
     pages = {295--296},
     publisher = {mathdoc},
     volume = {335},
     number = {3},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_335_3_a6/}
}