Déformations génériques des cusps
Singularités d'équations différentielles - Dijon, 20-25 mai 1985, Astérisque, no. 150-151 (1987), pp. 151-184.
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     author = {Roussarie, R.},
     title = {D\'eformations g\'en\'eriques des cusps},
     booktitle = {Singularit\'es d'\'equations diff\'erentielles - Dijon, 20-25 mai 1985},
     series = {Ast\'erisque},
     pages = {151--184},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {150-151},
     year = {1987},
     zbl = {0656.58002},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1987__150-151__151_0/}
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Roussarie, R. Déformations génériques des cusps, dans Singularités d'équations différentielles - Dijon, 20-25 mai 1985, Astérisque, no. 150-151 (1987), pp. 151-184. http://www.numdam.org/item/AST_1987__150-151__151_0/

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[I] Yu. S. Il'Jashenko : "The multiplicity of limit cycles arising from perturbations of the forms w'=P 2 /Q 1 of an hamilton equation in the real and complex domain". Amer. Math. Soc. Transl. (2) Vol. 118, 1982, Translation from : Trudy Seminar Petrovski 3, 1978, 49-60. | Zbl

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[T1] Fl. Takens, "Unfoldings of certain singularities of vector fields Generalised Hopf bifurcation". Journal of Diff. Equations, 14, 1973, 473-493. | DOI | Zbl

[T2] Fl. Takens, "Forced oscillations and bifurcations. In. Applications of Global Analysis I", Communications of Math. Inst. Rijksuniversiteit Utrecht 3, 1974. | Zbl