@article{SM_1982_43_4_a3,
     author = {F. T. Baranovskii},
     title = {A~mixed boundary value problem for a~hyperbolic equation with degenerate principal part},
     journal = {Sbornik. Mathematics},
     pages = {499--513},
     publisher = {mathdoc},
     volume = {43},
     number = {4},
     year = {1982},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1982_43_4_a3/}
}