TY  - JOUR
AU  - Cross, R.W.
TI  - Unbounded linear transformations of upper semi-Fredholm type in normed spaces
JO  - Portugaliae mathematica
PY  - 1990
SP  - 61
EP  - 79
VL  - 47
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1990__47_1_115701/
LA  - en
ID  - PORMA_1990__47_1_115701
ER  -