1. Applied Non-linear Dynamics;Nayfeh,1995
2. Finite Element Procedures;Bathe,1996
3. Introduction to perturbation techniques;Nayfeh,1981
4. A new numeric-analytical principle for nonlinear deterministic and stochastic dynamical systems;Roy;Proc. Roy. Soc. Lond. A,2001
5. G.L. Liu, New research directions in singular perturbation theory: artificial parameter approach and inverse-perturbation, in: Conference of 7th Modern Mathematics and Mechanics, Shanghai 1997, pp. 47–53.