1. di Bernardo, M., Budd, C. J., Champneys, A. R. and Kowalczyk, P., Piecewise-Smooth Dynamical Systems, Theory and Applications, Springer-Verlag, London, 2008.
2. Andronov, A. A., Khaikin, S. E. and Vitt, A. A., Theory of Oscillators, Pergamon Press, Oxford, 1965.
3. Kunze, M., Non-smooth Dynamical Systems, Springer-Verlag, Berlin, 2000.
4. Filippov, A. F., Differential Equations with Discontinuous Righthand Sides, Kluwer Academic, Netherlands, 1988.
5. Bernardo, M. D., Budd, C. J. and Champneys, A. R., Grazing, skipping and sliding: Analysis of the nonsmooth dynamics of the DC/DC buck converter, Nonlinearity, 11, 1998, 859–890.