The transversal homoclinic points are dense in the codimension-1 Hénon-like strange attractors

We consider the codimension-1 Hénon-like strange attractors $\Lambda$. We prove that the transversal homoclinic points are dense in $\Lambda$, and that hyperbolic periodic points are dense in $\Lambda$. Moreover the hyperbolic periodic points that are heteroclinically related to the primary fixed point ( transversal intersection of stable and unstable manifolds) are dense in $\Lambda$.