%0 Journal Article %A Lei Tan %T Branched coverings and cubic Newton maps %J Fundamenta Mathematicae %D 1997 %P 207-260 %V 154 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-154-3-207-260/ %R 10.4064/fm-154-3-207-260 %G en %F 10_4064_fm_154_3_207_260