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@article{CM_1959-1960__14__260_0, author = {Schoenberg, I. J. and Szeg\"o, Gabor}, title = {An extremum problem for polynomials}, journal = {Compositio Mathematica}, pages = {260--268}, publisher = {Kraus Reprint}, volume = {14}, year = {1959-1960}, mrnumber = {130520}, zbl = {0097.04902}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1959-1960__14__260_0/} }
Schoenberg, I. J.; Szegö, Gabor. An extremum problem for polynomials. Compositio Mathematica, Tome 14 (1959-1960), pp. 260-268. http://geodesic.mathdoc.fr/item/CM_1959-1960__14__260_0/