@article{GDZPPN002444429, title = {Uniform denominators in Hilbert's Seventeenth Problem.}, journal = {Mathematische Zeitschrift}, volume = {220}, year = {1995}, pages = {75-98}, zbl = {0828.12002}, url = {http://dml.mathdoc.fr/item/GDZPPN002444429} }
Reznick, Bruce. Uniform denominators in Hilbert's Seventeenth Problem.. Mathematische Zeitschrift, Tome 220 (1995) pp. 75-98. http://gdmltest.u-ga.fr/item/GDZPPN002444429/