@article{DE_1998_34_5_a9,
     author = {N. La\v{z}eti\'c},
     title = {On the existence of a classical solution of a mixed problem for a second-order one-dimensional hyperbolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {682--694},
     publisher = {mathdoc},
     volume = {34},
     number = {5},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_5_a9/}
}