TY  - BOOK
AU  - Murdock,James A.
TI  - Perturbations: theory and methods 
T2  - Classics in applied mathematics
SN  - 0898714435
AV  - QA871 M87 1999
PY  - 1999///
CY  - Philadelphia
PB  - Society for Industrial and Applied Mathematics
KW  - Perturbación (Matemáticas)
ER  -