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@article{DAN_1962_143_5_a2, author = {A. V. Bitsadze}, title = {Equations of mixed type in three-dimensional regions}, journal = {Doklady Akademii Nauk}, pages = {1017--1019}, publisher = {mathdoc}, volume = {143}, number = {5}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_143_5_a2/} }
A. V. Bitsadze. Equations of mixed type in three-dimensional regions. Doklady Akademii Nauk, Tome 143 (1962) no. 5, pp. 1017-1019. http://geodesic.mathdoc.fr/item/DAN_1962_143_5_a2/