@article{DE_1977_13_3_a11,
     author = {N. M. Krukovskii},
     title = {Uniqueness and membership in the class $W_2^1$ of the classical solution of a mixed problem for hyperbolic systems of {A.\,V.~Bicadze} type in an arbitrary cylinder},
     journal = {Differencialʹnye uravneni\^a},
     pages = {481--488},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_3_a11/}
}