1. Awrejcewicz, J., Bifurcation and Chaos in Simple Dynamical Systems., World Scientific, Singapore, 1989.
2. Awrejcewicz, J., Bifurcation and Chaos in Coupled Oscillators., World Scientific, Singapore, 1991.
3. Woafo, P., Chedjou, J. C., and Fotsin, H. B., ‘Dynamics of a system consisting a Van der Pol oscillator coupled to a Duffing oscillator,’ Physics Reviews E. 54., 1996, 5929–5934.
4. Awrejcewicz, J. and Delfs, J., ‘Dynamics of a self-exicted stick–slip oscillator with two degrees of freedom. Part I: Investigation of equilibria,’ European Journal of Mechanics, A/Solids. 9.(4), 1990, 269–282.
5. Awrejcewicz, J. and Delfs, J., ‘Dynamics of a self-exicted stick–slip oscillator with two degrees of freedom. Part II: Slip–stick, slip–slip, stick–slip transitions, periodic and chaotic orbits,’ European Journal of Mechanics, A/Solids. 9.(5), 1990, 397–418.