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@article{DE_1973_9_1_a9, author = {V. V. Kovrizhkin}, title = {Smoothness of the solutions of the generalized {Tricomi} problem}, journal = {Differencialʹnye uravneni\^a}, pages = {97--105}, publisher = {mathdoc}, volume = {9}, number = {1}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_1_a9/} }
V. V. Kovrizhkin. Smoothness of the solutions of the generalized Tricomi problem. Differencialʹnye uravneniâ, Tome 9 (1973) no. 1, pp. 97-105. http://geodesic.mathdoc.fr/item/DE_1973_9_1_a9/