Zimmermann, Firle, Natiello, Hildebrand, Eiswirth, Bar, Bangia, and Kevrekidis. (1997) 1997. “Pulse Bifurcation and Transition to Spatiotemporal Chaos in an Excitable Reaction-Diffusion Model”. Physica DPhysica D 110 (1-2): 92-104. Reference Link