1. Elements of Vibration Analysis;Meirovitch,1975
2. Vibration for Engineers;Dimarogonas,1996
3. Nichtlineare Schwingungen;Hagedorn,1978
4. Nonlinear Oscillations;Nayfeh,1979
5. Differential-algebraic equations;Beardmore;International Journal of Bifurcation and Chaos,1998