@article{MZM_1992_51_3_a11,
     author = {L. S. Pulkina},
     title = {Certain nonlocal problem for a degenerate hyperbolic equation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {91--96},
     publisher = {mathdoc},
     volume = {51},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1992_51_3_a11/}
}