1. W. Chin; E. Ott; H.E. Nusse; C. Grebogi: “Grazing bifurcations in impact oscillators,” Physical Review E 50 (1994), pp. 4427–4444.
2. P. Collet; J.-P. Eckmann: Iterated Maps on the Interval as Dynamical Systems, Birkhäuser, Boston, 1980.
3. J.-P. Eckmann; D. Ruelle: “Ergodic theory of chaos and strange attractors,” Reviews of Modern Physics 57 (1985), pp. 617–656.
4. C. Knudsen; R. Feldberg; H. True: “Bifurcations and chaos in a model of a rolling railway wheelset,” Philosophical Transactions of the Royal Society of London A 338 (1992), pp. 455–469.
5. W.T. Koiter: Over de Stabiliteit van het Elastisch Evenwicht (Dissertation, Delft University of Technology), H.J. Paris, Amsterdam, 1945.