Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{JRAM_1979__306_152091, author = {T.Y. Lam and R. Elman and A.R. Wadsworth}, title = {Orderings under field extensions.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {7--27}, publisher = {mathdoc}, volume = {306}, year = {1979}, zbl = {0398.12019}, url = {http://geodesic.mathdoc.fr/item/JRAM_1979__306_152091/} }
T.Y. Lam; R. Elman; A.R. Wadsworth. Orderings under field extensions.. Journal für die reine und angewandte Mathematik, Tome 306 (1979), pp. 7-27. http://geodesic.mathdoc.fr/item/JRAM_1979__306_152091/