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@article{MZ_1995__220_1_174799, author = {Bruce Reznick}, title = {Uniform denominators in {Hilbert's} {Seventeenth} {Problem.}}, journal = {Mathematische Zeitschrift}, pages = {75--98}, publisher = {mathdoc}, volume = {220}, number = {1}, year = {1995}, zbl = {0828.12002}, url = {http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174799/} }
Bruce Reznick. Uniform denominators in Hilbert's Seventeenth Problem.. Mathematische Zeitschrift, Tome 220 (1995) no. 1, pp. 75-98. http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174799/