@article{DE_1998_34_1_a19,
     author = {N. V. Derendyaev and V. A. Senyatkin},
     title = {The {Darboux} problem for a hyperbolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {124--126},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_1_a19/}
}