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@article{IVM_1971_11_a2, author = {D. L. Berman}, title = {A~certain polynomial operator}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {19--24}, publisher = {mathdoc}, number = {11}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1971_11_a2/} }
D. L. Berman. A~certain polynomial operator. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1971), pp. 19-24. http://geodesic.mathdoc.fr/item/IVM_1971_11_a2/