Introduction to Discrete Dynamical Systems and Chaos

Delay Differential Equations and Dynamical Systems: Proceedings of a Conference in honor of Kenneth Cooke held in Claremont, California, Jan. 13-16, 1990

Topological Methods for Ordinary Differential Equations: Lectures given at the 1st Session of the Centro Internazionale Matematico Estivo (C.I.M.E.) held in Montecatini Terme, Italy, June 24-July 2, 1991