@article{GDZPPN002101505,
title = {Bifurcations de points fixes elliptiques. II. Orbites p\'eriodiques et ensembles de Cantor invariants.},
journal = {Inventiones mathematicae},
volume = {82},
year = {1985},
pages = {81-106},
zbl = {0578.58031},
url = {http://dml.mathdoc.fr/item/GDZPPN002101505}
}
Chenciner, A. Bifurcations de points fixes elliptiques. II. Orbites périodiques et ensembles de Cantor invariants.. Inventiones mathematicae, Tome 82 (1985) pp. 81-106. http://gdmltest.u-ga.fr/item/GDZPPN002101505/