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@article{IVM_1978_5_a0, author = {D. L. Berman}, title = {On an extremal polynomial operator}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {3--8}, publisher = {mathdoc}, number = {5}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1978_5_a0/} }
D. L. Berman. On an extremal polynomial operator. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1978), pp. 3-8. http://geodesic.mathdoc.fr/item/IVM_1978_5_a0/