1. Chaos and Strange Attractors, School of Applied Mathematics. University of Warwick, England, private communication, pp. 19-26.
2. Simple mathematical models with very complicated dynamics
3. “Chaos and Order,” Department of Applied Mathematics. TW 243/83, Mathematical Centre, Amsterdam, The Netherlands, 1983, 38 pp.
4. and , “Universality in Transitions to Chaos,” an introductory lecture, September 1981, given at Nordita, Danmarks Tekniske Hojskole, Denmark, 1981, 36 pp.