A. Gasull, J. Llibre, X. Zhang.
One-dimensional quaternion homogeneous polynomial differential equations.
J. Math. Phys., 50, 082705. 2009. [DOI]
Abstract

A. Gasull, J. Torregrosa.
Models and predictions of world population.
Mat. Mat., 2009(4), 1-20. 2009. (In Catalan)
AbstractFull PDF

L. Jiménez-Lara, J. Llibre, M. Vargas.
Global phase portraits of the planar problems of two-fixed centers.
J. Math. Phys., 50(4), 042903, 10 pp.. 2009. [DOI]
Abstract

D. Juher.
Dels jeroglífics egipcis a la compartició de secrets.
Mat. Mat., 2009(1), 1-25. 2009. (In Catalan)
AbstractFull PDF

D. Juher, J. Ripoll, J. Saldaña.
Analysis and monte carlo simulations of a model for the spread of infectious diseases in heterogeneous metapopulations.
Phys. Rev. E, 80, 041920. 2009. [DOI]
Abstract

C. Li, J. Llibre.
The cyclicity of period annulus of a quadratic reversible Lotka-Volterra system.
Nonlinearity, 22, 2971-2979. 2009. [DOI]
Abstract

W. Li, J. Llibre, H. Wu.
Polynomial and linearized normal forms for almost periodic differential systems.
J. Difference Equ. Appl., 15(10), 927-948. 2009. [DOI]
Abstract

W. Li, J. Llibre, H. Wu.
Normal forms for almost periodic differential systems.
Ergodic Theory Dynam. Systems, 29, 637-656. 2009. [DOI]
Abstract

W. Li, J. Llibre, J. Yang, Z. Zhang.
Limit cycles bifurcating from the period annulus of quasi-homogeneous centers.
J. Dyn. Diff. Equat., 21(1), 133-152. 2009. [DOI]
Abstract

J. Llibre.
A survey on the limit cycles of the generalized polynomial Liénard differential equations.
In Proceedings of Mathematical Models in Engineering, Biology and Medicine Conference on Boundary Value Problems 2008, 224-233. Amer. Inst. Phys, 2009.
Abstract

J. Llibre.
Preface [The Fifth International Symposium on Hamiltonian Systems and Celestial Mechanics ({HAMSYS}-2008)].
Qual. Theory Dyn. Syst., 8(2), 207-208. 2009. [DOI] (Held in Guanajuato, July 7--11, 2008)

J. Llibre, P. R. Silva, M. A. Teixeira.
Study of singularities in nonsmooth dynamical systems via singular perturbation.
SIAM J. Appl. Dyn. Syst., 8(1), 508-526. 2009. [DOI]
Abstract

J. Llibre, A. Makhlouf.
Bifurcation of limit cycles from a 4-dimensional center in 1:n resonance.
J. Comput. Appl. Math., 215, 140-146. 2009. [DOI]
Abstract

J. Llibre, A. Makhlouf.
Limit cycles of polynomial differential systems bifurcating from the periodic orbits of a linear differential system in $ R^d$.
Bull. Sci. Math., 133, 578-587. 2009. [DOI]
Abstract

J. Llibre, A. Makhlouf, S. Badi.
3-dimensional Hopf bifurcation via averaging theory of second order.
Discrete Contin. Dyn. Syst., 25, 1287-1295. 2009. [DOI]
Abstract

J. Llibre, W. Marzantowicz.
Homotopy minimal periods of holomorphic maps on surfaces.
Funct. Approx. Comment. Math., 40(2), 309-326. 2009. [DOI]
Abstract

J. Llibre, L. F. Mello.
Triple and quadruple nested central configurations for the planar n-body problem.
Phys. D, 238, 563-571. 2009. [DOI]
Abstract

J. Llibre, L. F. Mello.
New central configurations for the planar 7-body problem.
Nonlinear Anal. Real World Appl., 10(4), 2246-2255. 2009. [DOI]
Abstract

J. Llibre, M. Messias.
Global dynamics of the Rikitake system.
Phys. D, 238, 241-252. 2009. [DOI]
Abstract

J. Llibre, R. D. S. Oliveira.
Phase portraits of quadratic polynomial vector fields having a rational first integral of degree 3.
Nonlinear Anal., 70(10), 3549-3560. 2009. [DOI]
Abstract