@article{DE_1978_14_8_a9,
     author = {\`E. L. {\CYRK}ulikov and V. Ph. Kirichenko},
     title = {On the estimation of the classical solution of a mixed problem for a hyperbolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1448--1454},
     publisher = {mathdoc},
     volume = {14},
     number = {8},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_8_a9/}
}