@article{PMIHES_1987__66__5_0,
     author = {Alain Chenciner},
     title = {Bifurcations de points fixes elliptiques - {III.} {Orbites} p\'eriodiques de {\guillemotleft} petites {\guillemotright} p\'eriodes et \'elimination r\'esonnante des couples de courbes invariantes},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {5--91},
     year = {1987},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {66},
     doi = {10.1007/BF02698927},
     mrnumber = {932134},
     zbl = {0712.58044},
     language = {fr},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02698927/}
}