@article{1183528951, author = {Dubois, D. W.}, title = {Note on Artin's solution of Hilbert's 17th problem}, journal = {Bull. Amer. Math. Soc.}, volume = {73}, number = {6}, year = {1967}, pages = { 540-541}, language = {en}, url = {http://dml.mathdoc.fr/item/1183528951} }
Dubois, D. W. Note on Artin's solution of Hilbert's 17th problem. Bull. Amer. Math. Soc., Tome 73 (1967) no. 6, pp. 540-541. http://gdmltest.u-ga.fr/item/1183528951/