@article{DE_1983_19_11_a18,
     author = {T. V. Chekmarev},
     title = {The {Tricomi} problem in a domain bounded by arcs of characteristics and by half lines which are perpendicular to the line of degeneracy},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1965--1971},
     publisher = {mathdoc},
     volume = {19},
     number = {11},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_11_a18/}
}