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@article{MS2_1964__15_165897, author = {G\"osta Wahde}, title = {An {Extremal} {Problem} {Related} to {Bernstein's} {Approximation} {Problem.}}, journal = {Mathematica Scandinavica}, pages = {131--141}, publisher = {mathdoc}, volume = {15}, year = {1964}, zbl = {0146.08201}, url = {http://geodesic.mathdoc.fr/item/MS2_1964__15_165897/} }
Gösta Wahde. An Extremal Problem Related to Bernstein's Approximation Problem.. Mathematica Scandinavica, Tome 15 (1964), pp. 131-141. http://geodesic.mathdoc.fr/item/MS2_1964__15_165897/