1. Impacts in Mechanical Systems—Analysis and Modelling;Brogliato,2000
2. M. di Bernardo, C.J. Budd, A.R. Champneys, P. Kowalczyk, Piecewise-smooth dynamical systems, in: Appl. Math. Sci. Series, vol. 163, London, 2008.
3. Impacts in Mechanical Systems;Kunze,2000
4. Dynamics and Bifurcations in Non-Smooth Mechanical Systems;Leine,2004
5. Hilberts 16th problem and bifurcations of planar polynomial vector fields;Li;Internat. J. Bifur. Chaos Appl. Sci. Engrg.,2003