1. D. Campbell, in Lectures in the Sciences of Complexity, D. L. Stein, ed., Addison-Wesley Advanced Book Program, Redwood City, CA, 1989.
2. R. L. Devaney, An Introduction to Chaotic Dynamical Systems, 2nd edition, Addison-Wesley Advanced Book Program, Redwood City, CA, 1989.
3. D. Gulick, Encounters with Chaos, McGraw-Hill, San Francisco, 1992.
4. An exploration of the Hénon quadratic map
5. E. A. Jackson, Perspectives of Nonlinear Dynamics, Vol. 1, Cambridge University Press, Cambridge, UK, 1989.