S. Li, J. Llibre.
Canard limit cycles for piecewise linear Liénard systems with three zones.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 30(15), 2050232, 7. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre.
On the centers of cubic polynomial differential systems with four invariant straight lines.
Topol. Methods Nonlinear Anal., 55(2), 387-402. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, B. D. Lopes, J. R. Moraes.
Periodic solutions of continuous third-order differential equations with piecewise polynomial nonlinearities.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 30(11), 2050158 (7 pages). 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, A. Makhlouf.
Periodic solutions for a class of non-autonomous Newton differential equations.
Differ. Equ. Dyn. Syst., 28(2), 373-379. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, A. Makhlouf.
On the periodic solutions of the relativistic driven harmonic oscillator.
J. Math. Phys., 61, 012501:1-6. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, A. Makhlouf.
Zero-Hopf periodic orbits for a Rössler differential system.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 30(12), 2050170 (6 pages). 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. P. Martinez-Mancilla.
Dynamics of a family of Lotka-Volterra systems in $R^3$.
Nonlinear Anal., 199, 111915:1-15. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. P. Martinez-Mancilla.
Dynamics of a competitive Lotka-Volterra systems in $R^3$.
Acta Appl. Math., 170, 569-577. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. P. Martinez-Mancilla, C. Valls.
On the global dynamics of a three-dimensional forced-damped differential system.
J. Nonlinear Math. Phys., 27(3), . 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. P. Martinez-Mancilla, C. Valls.
Limit cycles bifurcating of Kolmogorov systems in $R^2$ and in $R^3$.
Commun. Nonlinear Sci. Numer. Simul., 91, 105401:1-10. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. P. Martinez-Mancilla, C. Valls.
Global dynamics of a Lotka-Volterra system in $R^3$.
J. Nonlinear Math. Phys., 27(3), 509-519. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. P. Martinez-Mancilla, C. Vidal.
Limit cycles of a perturbation of a polynomial Hamiltonian systems of degree 4 symmetric with respect to the origin.
Canad. Math. Bull., 63(3), 547-561. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, L. d. A. S. Menezes.
On the limit cycles of a class of discontinuous piecewise linear differential systems.
Discrete Contin. Dyn. Syst. Ser. B, 25(5), 1835-1858. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, M. Messias, A. C. Reinol.
Zero-Hopf bifurcations in three-dimensional chaotic systems with one stable equilibrium.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 30(12), 2050189. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, A. Murza, C. Valls.
On a conjecture on the integrability of Liénard systems.
Rend. Circ. Mat. Palermo (2), 69, 209-216. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, A. Nabavi, M. Mousavi.
Limit cycles bifurcating from a family of reversible quadratic centers via averaging theory.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 30(4), 2050051:1-8. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, D. D. Novaes, C. A. B. Rodrigues de Lima.
Bifurcations from families of periodic solutions in piecewise differential systems.
Phys. D, 404, 132342:1-12. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, D. D. Novaes, I. O. Zeli.
Limit cycles of piecewise polynomial perturbations of higher dimensional lineal differential systems.
Rev. Mat. Iberoam., 36(1), . 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, R. D. S. Oliveira, C. A. B. Rodrigues de Lima.
Limit cycles for two classes of control piecewise linear differential systems.
Sao Paulo J. Math. Sci., 1-17. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Pantazi.
Qualitative study of a model with Rastall gravity.
Classical Quantum Gravity, 37(24), 245010:1-25. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB