Global Classification of a Class of cubic Vector Fields whose Canonical Regions are Period annuli. - Magdalena Caubergh; Jaume Llibre; Joan Torregrosa (Int. J. Bifurc. Chaos, 2011)

Global Phase portraits of some Reversible cubic Centers with Collinear or Infinitely Many Singularities. - Magdalena Caubergh; Jaume Llibre; Joan Torregrosa (Int. J. Bifurc. Chaos, 2012)

Global phase Portraits of some Reversible cubic Centers with Noncollinear singularities. - Magdalena Caubergh; Joan Torregrosa (Int. J. Bifurc. Chaos, 2013)