@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/