Limit cycles of cubic polynomial differential systems with rational first integrals of degree 2. - Jaume Llibre; Bruno D. Lopes; Jaime R. de Moraes (Appl. Math. Comput., 2015)

Limit cycles bifurcating from the periodic annulus of the weight-homogeneous polynomial centers of weight-degree 2. - Jaume Llibre; Bruno D. Lopes; Jaime R. de Moraes (Appl. Math. Comput., 2016)

Periodic Solutions of Continuous Third-Order Differential Equations with Piecewise Polynomial Nonlinearities. - Jaume Llibre; Bruno D. Lopes; Jaime R. de Moraes (Int. J. Bifurc. Chaos, 2020)