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@article{DAN_1980_250_5_a1, author = {G. D. Dachev}, title = {On some boundary value problems for a class of equations of mixed type}, journal = {Doklady Akademii Nauk}, pages = {1037--1040}, publisher = {mathdoc}, volume = {250}, number = {5}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1980_250_5_a1/} }
G. D. Dachev. On some boundary value problems for a class of equations of mixed type. Doklady Akademii Nauk, Tome 250 (1980) no. 5, pp. 1037-1040. http://geodesic.mathdoc.fr/item/DAN_1980_250_5_a1/