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@article{KUKZ_1967_4_4_a17, author = {Kh. A. Chikhanov}, title = {The equation of mixed type with an arbitrary line of degeneracy}, journal = {Trudy seminara po kraevym zada\v{c}am}, pages = {148--152}, publisher = {mathdoc}, volume = {4}, number = {4}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KUKZ_1967_4_4_a17/} }
Kh. A. Chikhanov. The equation of mixed type with an arbitrary line of degeneracy. Trudy seminara po kraevym zadačam, Trudy Seminara po Kraevym Zadacham, Tome 4 (1967) no. 4, pp. 148-152. http://geodesic.mathdoc.fr/item/KUKZ_1967_4_4_a17/