%0 Journal Article %A M. L. Brown %T Zero Estimates for Polynomials Over Commutative Rings. %J Mathematische Annalen %D 1985 %P 489-504 %V 272 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1985__272_164027/ %F MAN_1985__272_164027