TY - BOOK AU - Nayfeh, Ali Hasan TI - PERTURBATION METHODS U1 - 629.101515 PY - 1973/// CY - N. Y. PB - John Wiley KW - Perturbation (Mathematics) KW - Asymptotic Expansions KW - Differential Equations -- Numerical Solutions N1 - Ref. & Auth. Index : P. 387-415 ER -