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@article{IVM_1977_10_a8, author = {Ju. M. Krikunov}, title = {On the {Tricomi} problem for a~square}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {81--85}, publisher = {mathdoc}, number = {10}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1977_10_a8/} }
Ju. M. Krikunov. On the Tricomi problem for a~square. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1977), pp. 81-85. http://geodesic.mathdoc.fr/item/IVM_1977_10_a8/