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@article{IVM_1968_7_a11, author = {S. Z. Rafal'son}, title = {The approximation of functions in the mean by {Fourier--Hermite} sums}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {78--84}, publisher = {mathdoc}, number = {7}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_7_a11/} }
S. Z. Rafal'son. The approximation of functions in the mean by Fourier--Hermite sums. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 7 (1968), pp. 78-84. http://geodesic.mathdoc.fr/item/IVM_1968_7_a11/