J. L. G. Guirao, J. Llibre, J. A. Vera.
Generalized van der Waals Hamiltonian: Periodic orbits and $C^1$ nonintegrability.
Phys. Rev. E, 85, 036603 (5 pages). 2012. [DOI]
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J. L. G. Guirao, M. A. López, J. Llibre, R. Martínez.
A note on the equilibria of an economic model with local competition ‘‘à la Cournot’’.
J. Comput. Appl. Math., 236, 3052-3057. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Itikawa.
The center-focus problem for planar nilpotent singularities.
Masters thesis, Universidade de Sao Paulo, 2012. (In Portuguese)
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L. Jiménez-Lara, J. Llibre.
The cored and logarithm galactic potentials: periodic orbits and integrability.
J. Math. Phys., 53, 042901. 2012. [DOI]
AbstractPreprint at DDDUAB

E. A. Lacomba, J. Llibre.
Dynamics of a galactic Hamiltonian system.
J. Math. Phys., 53, 072901. 2012. [DOI]
AbstractPreprint at DDDUAB

C. Li, J. Llibre.
Uniqueness of limit cycle for Liénard differential equations of degree four.
J. Differential Equations, 252, 3142-3162. 2012. [DOI]
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M. F. S. Lima, J. Llibre.
Limit cycles for a class of continuous piecewise linear differential systems with three zones.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 22(6), 1250138. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre.
Periodic point free continuous self-maps on graphs and surfaces.
Topology Appl., 159, 2228-2231. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, Y. M. Bolaños Rivera.
Rational first integrals for polynomial vector fields on algebraic hypersurfaces of $\mathbb R^{N+1}$.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 22(11), 1250270 (11 pages). 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, P. R. Silva, M. A. Teixeira.
Synchronization and non-smooth dynamical systems.
J. Dyn. Diff. Equat., 24, 1-12. 2012. [DOI]
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J. Llibre, A. Makhlouf.
On the limit cycles for a class of fourth-order differential equations.
J. Phys. A, 45, 055214. 2012. [DOI]
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J. Llibre, A. Makhlouf.
Limit cycles for a class of fourth-order autonomous differential equations.
Electron. J. Differential Equations, 2012(22), 1-17. 2012.
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J. Llibre, A. Makhlouf.
Periodic orbits of the fourh-order non-autonomous differential equation $u' ' ' ' + q u ' ' + p u=\varepsilon f(t,u,u' , u' ' , u' ' ')$.
Appl. Math. Comput., 219, 827-836. 2012. [DOI]
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J. Llibre, A. Makhlouf.
Periodic orbits of a non-autonomous quadratic differential system obtained from third-order differential equations.
Dyn. Syst., 27(2), 161-168. 2012. [DOI]
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J. Llibre, A. Makhlouf.
Periodic orbits of the spatial anisotropic Manev problem.
J. Math. Phys., 53, 122903. 2012. [DOI]
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J. Llibre, J. Martínez Alfaro.
An upper bound of the index of an equilibrium point in the plane.
J. Differential Equations, 253, 2460-2473. 2012. [DOI]
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J. Llibre, L. F. Mello.
On the periodic orbits of perturbed Hooke Hamiltonian systems with three degrees of freedom.
J. Geom. Phys., 62, 1054-1063. 2012. [DOI]
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J. Llibre, M. Messias, P. R. Silva.
Global dynamics in the Poincare ball of the Chen system having invariant algebraic surfaces.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 22(6), 1250154. 2012. [DOI]
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J. Llibre, C. Pantazi, S. Walcher.
First integrals of local analytic differential systems.
Bull. Sci. Math., 136, 342-359. 2012. [DOI]
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J. Llibre, D. Peralta-Salas.
A note on the first integrals of vector fields with integrating factors and normalizers.
SIGMA Symmetry Integrability Geom. Methods Appl., 8(35), 9 pages. 2012. [DOI]
AbstractPreprint at DDDUAB