Periodic Orbits of Third Kind in the Zonal J2 + J3 Problem. - María Teresa de Bustos; Antonio Fernández 006; Miguel A. López 001; Raquel Martínez; Juan Antonio Vera (Symmetry, 2019)

The Circular Hill Problem Regarding Arbitrary Disturbing Forces: The Periodic Solutions that are Emerging from the Equilibria. - María Teresa de Bustos; Miguel A. López 001; Raquel Martínez (Symmetry, 2019)

Existence of Periodic Solutions for a Class of the Generalized Liénard Equations. - María Teresa de Bustos; Zouhair Diab; Juan Luis García Guirao; Miguel Ángel López 001; Raquel Martínez (Symmetry, 2022)