@article{DE_1985_21_9_a12,
     author = {V. A. Chernyatin},
     title = {Refinement of the theorem on the existence of a classical solution of the mixed problem for a one-dimensional wave equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1569--1576},
     publisher = {mathdoc},
     volume = {21},
     number = {9},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_9_a12/}
}