%0 Journal Article %A J., Takens, F. Palis %T Cycles and measure of bifurcation sets for two-dimensional diffeomorphisms. %J Inventiones mathematicae %D 1985 %P 397-422 %V 82 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1985__82_143292/ %F IM_1985__82_143292