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@article{IVM_1969_4_a8, author = {B. A. Plamenevskii and M. \`E. Yudovin}, title = {The smoothness of convolution operators}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {47--58}, publisher = {mathdoc}, number = {4}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_4_a8/} }
B. A. Plamenevskii; M. È. Yudovin. The smoothness of convolution operators. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1969), pp. 47-58. http://geodesic.mathdoc.fr/item/IVM_1969_4_a8/