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Celestial Mech. Dynam. Astronom., 89(4), 319-342. 2004. [DOI]
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J. Delgado, E. A. Lacomba, J. Llibre.
New advances in celestial mechanics and Hamiltonian systems.
Kluwer Academic/Plenum Publishers, New York, 2004.
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P. Dominguez, N. Fagella.
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N. Fagella, T. Martinez-Seara, J. Villanueva.
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A. Falcó, J. Guardiola.
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In Working Papers. Serie EC (2002), 1-16. Instituto Valenciano de Investigaciones Económicas, SA (Ivie), 2004.
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M. Falconi, E. A. Lacomba, J. Llibre.
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M. Falconi, J. Llibre.
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E. Freire, A. Gasull, A. Guillamon.
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E. Freire, A. Gasull, A. Guillamon.
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I. A. García, J. Giné.
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Discrete Contin. Dyn. Syst., 10(3), 755-768. 2004.
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A. Garijo, A. Gasull, X. Jarque.
Normal forms for singularities of one dimensional holomorphic vector fields.
Electron. J. Differential Equations, 2004(122), 1-7. 2004.
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A. Gasull, A. Guillamon, J. Villadelprat.
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J. Giné.
Analytic integrability and characterization of centers for generalized nilpotent singular points.
Appl. Math. Comput., 148(3), 849-868. 2004.
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J. Giné.
Analytic integrability and characterization of centers for nilpotent singular points.
Z. Angew. Math. Phys., 55(5), 725-740. 2004.
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J. Giné.
On the existence of limit cycles for some class of polynomial planar systems.
Differ. Equ. Dyn. Syst., 12(03/04/09), 289-299. 2004.

J. Giné, J. Llibre.
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J. Giné, X. Santallusia.
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A. Guillamon.
Una introducció a les matemàtiques de l'activitat neuronal.
Butl. Soc. Catalana Mat., 19, 25-45. 2004. ((In Catalan))
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F. Ikhouane, V. Mañosa, J. Rodellar.
Bounded and dissipative solutions of the Bouc-Wen model for hysteretic structural systems.
In Proceeding of the 2004 American Control Conference. Boston, Massachusetts June 30 - July 2, 2004, 3520-3525. Boston, Massachusetts, 2004.
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C. Li, J. Llibre.
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