↑Ekeland (1988, Appendix 2 The Feigenbaum bifurcation, pp. 132–138)) describes the chaotic behavior of the iteratedlogistic function, which exhibits the Feigenbaum bifurcation. A paperback edition was published: Ekeland, Ivar (1990). Mathematics and the unexpected Paperback ed. [S.l.]: University Of Chicago Press. ISBN0-226-19990-8