@article{DE_1990_26_5_a12,
     author = {K. B. Sabitov},
     title = {On a question on the generalized {Tricomi} problem that arises in the theory of the {Laval} nozzle. {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {841--851},
     publisher = {mathdoc},
     volume = {26},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_5_a12/}
}