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@article{DAN_1961_140_3_a0, author = {D. L. Berman}, title = {Extremal problems in the theory of polynomial operators (non-periodic case)}, journal = {Doklady Akademii Nauk}, pages = {519--521}, publisher = {mathdoc}, volume = {140}, number = {3}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_140_3_a0/} }
D. L. Berman. Extremal problems in the theory of polynomial operators (non-periodic case). Doklady Akademii Nauk, Tome 140 (1961) no. 3, pp. 519-521. http://geodesic.mathdoc.fr/item/DAN_1961_140_3_a0/