@article{DE_1998_34_1_a11,
     author = {A. V. Bulatov},
     title = {On the adjointness of the {Darboux} and the {Dirichlet} problems for degenerate hyperbolic equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {69--77},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_1_a11/}
}