TY  - JOUR
AU  - Freire, Nuno C.
TI  - On the exponential of a bounded linear operator in a L(E,E) algebra
JO  - Portugaliae mathematica
PY  - 1991
SP  - 363
EP  - 382
VL  - 48
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1991__48_4_115763/
LA  - en
ID  - PORMA_1991__48_4_115763
ER  -