@article{DE_1981_17_2_a14,
     author = {E. I. Moiseev},
     title = {The {Tricomi} problem for the {Lavrent'ev--Bitsadze} equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {325--338},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_2_a14/}
}