1. Erzwungene schwingungen bei veränderlicher eigenfrequenz und ihre technische bedeutung;Duffing,1918
2. Chaos in nonlinear oscillators: controlling and synchronization;Lakshmanan,1996
3. Introduction to experimental nonlinear dynamics: a case study in mechanical vibration;Virgin,2000
4. Vibration of axially-loaded structures;Virgin,2007
5. The duffing equation: nonlinear oscillators and their behaviour;Kovacic,2011