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@article{IVM_1962_1_a1, author = {L. Vol'fersdorf}, title = {On the singular elliptic {Neumann} problem for the {Tricomi} equation}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {14--19}, publisher = {mathdoc}, number = {1}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1962_1_a1/} }
L. Vol'fersdorf. On the singular elliptic Neumann problem for the Tricomi equation. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1962), pp. 14-19. http://geodesic.mathdoc.fr/item/IVM_1962_1_a1/