TY  - BOOK
AU  - Nayfeh, Ali Hasan
TI  - Perturbation methods
SN  - 0-471-63059-4
U1  - 629.101515 21st
PY  - 1973///
CY  - New York
PB  - John Wileg and Sons
KW  - Perturbation (Mathematics); Asymptotic expansions; Differential equations-Numerical solutions
ER  -