1. Structural vibration analysis: modelling, analysis and damping of vibrating structures;Maw;Mech. Work. Technol.,1984
2. Elements of Structural Dynamics;Berg,1989
3. Introduction to Structural Dynamics;Biggs,1964
4. Stability and primary simultaneous resonance of harmonically excited nonlinear spring pendulum system;Eissa;Appl. Math. Comput.,2003
5. Introduction to Perturbation Techniques;Nayfeh,1981