@article{DE_1990_26_5_a14,
     author = {T. V. Chekmarev},
     title = {The {Tricomi} problem for a model system of equations in domains of special forms},
     journal = {Differencialʹnye uravneni\^a},
     pages = {860--872},
     publisher = {mathdoc},
     volume = {26},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_5_a14/}
}