%0 Journal Article %A Graça, Mário M. %T On the computation of nonhyperbolic fixed points. %J Experimental mathematics %D 2002 %P 477-485 %V 11 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/EXMA_2002__11_4_55456/ %G en %F EXMA_2002__11_4_55456