@article{DE_1976_12_5_a11,
     author = {Z. O. Mel'nik and V. N. Tsymbal},
     title = {A mixed problem for a first order hyperbolic system with a small parameter multiplying the derivatives},
     journal = {Differencialʹnye uravneni\^a},
     pages = {902--907},
     publisher = {mathdoc},
     volume = {12},
     number = {5},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_5_a11/}
}