TY  - GEN
AU  - Giacaglia,Giorgio E.O
TI  - Perturbation methods in non-linear systems
SN  - 0387900543
U1  - 531.30151738 
PY  - 1972///
CY  - New York
PB  - Springer-Verlag
KW  - Differential equations, Nonlinear
KW  - Perturbation (Mathematics)
N1  - Contine bibliogr. p.560 si index p. 549
ER  -