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@article{IM_1985__82_143292, author = {J., Takens, F. Palis}, title = {Cycles and measure of bifurcation sets for two-dimensional diffeomorphisms.}, journal = {Inventiones mathematicae}, pages = {397--422}, publisher = {mathdoc}, volume = {82}, year = {1985}, zbl = {0579.58005}, url = {http://geodesic.mathdoc.fr/item/IM_1985__82_143292/} }
J., Takens, F. Palis. Cycles and measure of bifurcation sets for two-dimensional diffeomorphisms.. Inventiones mathematicae, Tome 82 (1985), pp. 397-422. http://geodesic.mathdoc.fr/item/IM_1985__82_143292/