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@article{DE_1973_9_1_a1, author = {M. Kh. Abregov}, title = {A certain problem for the {Tricomi} equation}, journal = {Differencialʹnye uravneni\^a}, pages = {5--17}, publisher = {mathdoc}, volume = {9}, number = {1}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_1_a1/} }
M. Kh. Abregov. A certain problem for the Tricomi equation. Differencialʹnye uravneniâ, Tome 9 (1973) no. 1, pp. 5-17. http://geodesic.mathdoc.fr/item/DE_1973_9_1_a1/