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@article{DAN_1977_235_4_a1, author = {A. V. Bitsadze}, title = {On the {Tricomi} problem for nonlinear equations of mixed type}, journal = {Doklady Akademii Nauk}, pages = {733--736}, publisher = {mathdoc}, volume = {235}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_235_4_a1/} }
A. V. Bitsadze. On the Tricomi problem for nonlinear equations of mixed type. Doklady Akademii Nauk, Tome 235 (1977) no. 4, pp. 733-736. http://geodesic.mathdoc.fr/item/DAN_1977_235_4_a1/