TY  - BOOK
AU  - Nayfeh,Ali Hasan
TI  - Problems in perturbation
PY  - 1985///
CY  - United states of America
PB  - John Wiley and Sons, Inc.
KW  - ECUACIONES DIFERENCIALES
KW  - LEMB
KW  - MATEMATICA
KW  - PERTURBACION
ER  -