“…According to [Barrio et al, 2011;Bykov, 2000], for small λ 1 > 0 the line of points (λ 1 , 0) is surrounded by two spiral sheets arbitrarily close to the line within which we observe two families of homoclinic cycles of Shilnikov type, one attracting and another accumulated by horseshoes. These phenomena have also been explored in [Algaba et al, 2011] and [Lamb et al, 2005]; we will give more details about them in Section 10. Among others, references [Aguiar et al, 2005;Algaba et al, 2011;Bykov, 2000;Fernández-Sánchez et al, 2002;Labouriau & Rodrigues, 2012;Rodrigues & Labouriau, 2014;Rodrigues, 2013] have been devoted to the study of T -points and the global bifurcations that they organize in the parameter space.…”