Orbital normal forms for a class of three-dimensional systems with an application to Hopf-zero bifurcation analysis of Fitzhugh-Nagumo system. - Antonio Algaba; Natalia Fuentes; Estanislao Gamero; Cristóbal García (Appl. Math. Comput., 2020)

On the integrability problem for the Hopf-zero singularity and its relation with the inverse Jacobi multiplier. - Antonio Algaba; Natalia Fuentes; Estanislao Gamero; Cristóbal García (Appl. Math. Comput., 2021)