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@article{IVM_1973_3_a13, author = {Kh. A. Chikhanov}, title = {The problem $T_1$ for a certain higher order equation of mixed type}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {102--106}, publisher = {mathdoc}, number = {3}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1973_3_a13/} }
Kh. A. Chikhanov. The problem $T_1$ for a certain higher order equation of mixed type. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1973), pp. 102-106. http://geodesic.mathdoc.fr/item/IVM_1973_3_a13/