@article{DAN_1970_195_1_a5,
     author = {K. A. Kasymov},
     title = {Asymptotics of the solution of the problem with initial jump for second order hyperbolic equations that contain a small parameter},
     journal = {Doklady Akademii Nauk},
     pages = {28--31},
     publisher = {mathdoc},
     volume = {195},
     number = {1},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_195_1_a5/}
}