TY  - JOUR
AU  - Kemp, R. R. D.
AU  - Lee, S. J.
TI  - Finite Dimensional Perturbations of Differential Expressions
JO  - Canadian journal of mathematics
PY  - 1976
SP  - 1082
EP  - 1104
VL  - 28
IS  - 5
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-108-4/
DO  - 10.4153/CJM-1976-108-4
ID  - 10_4153_CJM_1976_108_4
ER  -