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@article{IVM_1973_3_a10, author = {V. S. Mokeichev}, title = {Periodic solutions of partial differential equations}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {77--87}, publisher = {mathdoc}, number = {3}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1973_3_a10/} }
V. S. Mokeichev. Periodic solutions of partial differential equations. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1973), pp. 77-87. http://geodesic.mathdoc.fr/item/IVM_1973_3_a10/