J. Llibre, E. Ponce.
Three nested limit cycles in discontinuous piecewise linear differential systems with two zones.
Dynam. Contin. Discrete Impuls. Systems. Ser. B, 19, 325-335. 2012.
AbstractPreprint at DDDUAB

J. Llibre, R. Rabanal.
Planar real polynomial differential systems of degree $n>3$ having a weak focus of high order.
Rocky Mountain J. Math., 42(2), 657-693. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, F. Rong.
Minimal periods of holomorphic maps on complex tori.
J. Difference Equ. Appl., 18(12), 2059-2068. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, R. Saghin.
Topological entropy and periods of graph maps.
J. Difference Equ. Appl., 18(4), 589-598. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, V. F. Sirvent.
Minimal sets of periods for Morse-Smale diffeomorphisms on non-orientable compact surfaces without boundary.
J. Difference Equ. Appl., 19(3), 402-417. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Stoica, C. Valls.
Polynomial and rational integrability of polynomial Hamiltonian systems.
Electron. J. Differential Equations, 2012(108), 1-6. 2012.
AbstractPreprint at DDDUAB

J. Llibre, M. A. Teixeira.
On the periodic orbits of the fourth-order differential equation $u' ' ' '+qu' '−u=\varepsilon f (u,u',u' ',u' ' ')$.
J. Math. Anal. Appl., 387, 181-188. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Valls.
A note on the first integrals of the ABC system.
J. Math. Phys., 53, 1-5 (023505). 2012. [DOI] (Paper selected to be in Research Highlight Archive for 2012)
AbstractPreprint at DDDUAB

J. Llibre, C. Valls.
On the number of limit cycles of a class of polynomial differential systems.
Proc. R. Soc. Lond. Ser. A Math. Phys. Eng. Sci., 1-14. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Liouvillian and analytic first integrals for the Brusselator system.
J. Nonlinear Math. Phys., 19(2), 8 pp.. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Valls.
On the integrability of a Muthuswamy-Chua system.
J. Nonlinear Math. Phys., 19(4), 1250029 (12 pages). 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Valls.
First integrals for a charged particle moving on a plane under the action of a magnetic field orthogonal to this plane.
Internat. J. Non-Linear Mech., 47, 965-967. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Polynomial first integrals for the Chen and Lu systems.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 22(11), 125022 (7 pages). 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Valls.
On the polynomial integrability of the Kirchoff's equations.
Phys. D, 241, 1417-1420. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Darboux integrability of a simplied Friedmann-Robertson-Walker Hamiltonian system.
J. Nonlinear Math. Phys., 19(4), 1250036 (11 pages). 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, C. Vidal.
Periodic orbits and non-integrability in a cosmological scalar field.
J. Math. Phys., 53, 012702. 2012. [DOI]
AbstractPreprint at DDDUAB

J. Llibre, X. Zhang.
On the Darboux integrability of the polynomial differential systems.
Qual. Theory Dyn. Syst., 11, 129-144. 2012. [DOI]
AbstractPreprint at DDDUAB

A. Mahdi, M. Olufsen, J. Ottesen.
Qualitative aspects of a novel baroreceptor model.
In Proceedings of the International Workshop on Innovative Simulation for Health Care, 2012, . 2012. (Backfrieder, Bruzzone, Longo, Novak, Rosen, Eds.)
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A. Mahdi, C. Valls.
Analytic non-integrability of the Suslov problem.
J. Math. Phys., 53, 122901. 2012. [DOI]
AbstractPreprint at DDDUAB

D. D. Novaes.
Periodic orbits of some coupled differential equations.
Masters thesis, Universidade Estadual de Campinas, Campinas (Brasil), July, 2012.
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