1. Introduction to perturbation techniques;Nayfeh,1979
2. Perturbation methods, bifurcation theory and computer algebraic;Rand,1987
3. General problem on stability of motion (English translation);Lyapunov,1992
4. Methods of dynamics calculation and testing for thin-walled structures;Karmishin,1990
5. Solving frontier problems of physics: the decomposition method;Adomian,1994