TY  - BOOK
AU  - Kato,Tosio
TI  - A short introduction to perturbatuion theory for linear operators
SN  - 0387906665
PY  - 1982///
CY  - New York, N.Y.
PB  - Springer-Verlag
KW  - Linear operators
KW  - Perturbation (Mathematics)
ER  -