J. Llibre, L. A. Roberto.
New doubly-symmetric families of comet-like periodic orbits in the spatial restricted (N+1)-body problem.
Celestial Mech. Dynam. Astronom., 104, 307-318. 2009. [DOI]
Abstract

J. Llibre, R. Saghin.
Results and open questions on some of the invariants measuring the dynamical complexity of a map.
Fund. Math., 206, 307-327. 2009. [DOI]
Abstract

J. Llibre, N. Sellami, A. Makhlouf.
Limit cycles for a class of fourth-order differential equations.
Applicable Analysis, 88, 1617-1630. 2009. [DOI]
Abstract

J. Llibre, V. F. Sirvent.
Minimal sets of periods for Morse-Smale diffeomorphisms on orientable compact surfaces.
Houston J. Math., 35(3), 835-855. 2009.
Abstract

J. Llibre, M. A. Teixeira.
Limit cycles bifurcating from a 2-dimensional isochronous cylinder.
Appl. Math. Lett., 22(8), 1231-1234. 2009. [DOI]
Abstract

J. Llibre, C. Valls.
Centers for polynomial vector fields of arbitrary degree.
Commun. Pure Appl. Anal., 8(2), 725-742. 2009. [DOI]
Abstract

J. Llibre, C. Valls.
Classification of the centers, their cyclicity and isochronicity for the generalized quadratic polynomial differential systems.
J. Math. Anal. Appl., 357, 427-437. 2009. [DOI]
Abstract

J. Llibre, C. Valls.
Analytic first integrals of the Fitzhugh-Nagumo systems.
Z. Angew. Math. Phys., 60(2), 237-245. 2009. [DOI]
Abstract

J. Llibre, C. Valls.
Classification of the centers and of the isochronous centers for a class of quartic-like systems.
Nonlinear Anal., 71, 3119-3128. 2009. [DOI]
Abstract

J. Llibre, C. Valls.
Classification of the centers, of their cyclicity and isochronicity for two classes of generalized quintic polynomial differential systems.
NoDEA Nonlinear Differential Equations Appl., 16, 657-679. 2009. [DOI]
Abstract

J. Llibre, C. Valls.
Classification of the centers, their cyclicity and isochronicity for a class of polynomial differential systems generalizing the linear systems with cubic homogeneous nonlinearities.
J. Differential Equations, 246, 2192-2204. 2009. [DOI]
Abstract

J. Llibre, C. Valls.
Global analytic first integrals for the simplified multistrain/two-stream model for tuberculosis and dengue fever.
J. Nonlinear Math. Phys., 16(4), 505-516. 2009. [DOI]
Abstract

J. Llibre, H. Wu, J. Yu.
Linear estimate for the number of limit cycles of a perturbed cubic polynomial differential system.
Nonlinear Anal., 70, 419-432. 2009. [DOI]
Abstract

J. Llibre, J. Yu.
On the periodic orbits of the static spherically symmetric Einstein-Yang-Mills equations.
Commun. Math. Phys., 286, 277-281. 2009. [DOI]
Abstract

J. Llibre, X. Zhang.
Darboux theory of integrability in $ C^n$ taking into account the multiplicity.
J. Differential Equations, 246, 541-551. 2009. [DOI]
Abstract

J. Llibre, X. Zhang.
Hopf bifurcation in higher dimensional differential systems via the averaging method.
Pacific J. Math., 240(2), 321-341. 2009. [DOI]
Abstract

J. Llibre, X. Zhang.
Darboux theory of integrability for polynomial vector fields in $ R^n$ taking into account the multiplicity at infinity.
Bull. Sci. Math., 133, 765-778. 2009. [DOI]
Abstract

M. Llorens.
Dynamical systems associated to Landen transformations.
Masters thesis, Universitat Autònoma de Barcelona, July, 2009. (In Catalan)
Abstract

S. Luca, F. Dumortier, M. Caubergh, R. Roussarie.
Detecting alien limit cycles near a Hamiltonian 2-saddle cycles.
Discrete Contin. Dyn. Syst., 25(4), 1081-1108. 2009. [DOI]
Abstract

F. Mañosas, J. Villadelprat.
Criteria to bound the number of critical periods.
J. Differential Equations, 246, 2415-2433. 2009. [DOI]
Abstract