Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1980__171_172919, author = {Bruce Reznick and M.-D. Choi and T.-Y. Lam}, title = {Real {Zeros} of {Positive} {Semidefinite} {Forms.} {I.}}, journal = {Mathematische Zeitschrift}, pages = {1--26}, publisher = {mathdoc}, volume = {171}, year = {1980}, zbl = {0415.10018}, url = {http://geodesic.mathdoc.fr/item/MZ_1980__171_172919/} }
Bruce Reznick; M.-D. Choi; T.-Y. Lam. Real Zeros of Positive Semidefinite Forms. I.. Mathematische Zeitschrift, Tome 171 (1980), pp. 1-26. http://geodesic.mathdoc.fr/item/MZ_1980__171_172919/