%0 Journal Article %A Lewis, D. W. %T Annihilating Polynomials and Positive Forms %J Canadian mathematical bulletin %D 1992 %P 103-107 %V 35 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1992-015-4/ %R 10.4153/CMB-1992-015-4 %F 10_4153_CMB_1992_015_4