A note on the periodic orbits of a kind of Duffing equations. - Jaume Llibre; Ana Rodrigues 002 (Appl. Math. Comput., 2013)

A non-autonomous kind of Duffing equation. - Jaume Llibre; Ana Rodrigues 002 (Appl. Math. Comput., 2015)

On the Dynamics of the Unified Chaotic System Between Lorenz and Chen Systems. - Jaume Llibre; Ana Rodrigues 002 (Int. J. Bifurc. Chaos, 2015)