REFERENCES
- Robert L. Devaney, An Introduction To Chaotic Dynamical Systems, second edition, Addison-Wesley, Redwood City, California, 1989.
- W. de Melo and S. J. van Strien, Lectures on One-Dimensional Dynamical Systems, to appear.
- T. Y. Li and J. A. Yorke, Period three implies chaos, this Monthly, 82 (1975) 986–988.
- Philip D. Straffin, Jr. Periodic points of continuous functions, Math. Mag., 51 (1978) 99–105.