Cycles and bifurcation theory

Newhouse, S.; Palis, J.

Astérisque, Trois études en dynamique qualitative, (1976) p. 43-140

There is a simple arc joining any two Morse-Smale flows

Newhouse, S.; Peixoto, Mauricio Matos

Astérisque, Trois études en dynamique qualitative, (1976) p. 15-41