TY  - JOUR
AU  - W.M. Greenlee
TI  - Stability Theorems for Singular Perturbation of Eigenvalues.
JO  - Manuscripta mathematica
PY  - 1981
SP  - 157
EP  - 174
VL  - 34
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM2_1981__34_154769/
ID  - MM2_1981__34_154769
ER  -