%0 Journal Article %A Ben Lichtin %T Estimation of Lojasiewicz Exponents and Newton Polygons. %J Inventiones mathematicae %D 1981 %P 417-430 %V 64 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1981__64_142829/ %F IM_1981__64_142829