@article{DE_1992_28_12_a10,
     author = {K. B. Sabitov},
     title = {On the existence of a solution to the {Tricomi} problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2092--2101},
     publisher = {mathdoc},
     volume = {28},
     number = {12},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_12_a10/}
}