TY  - JOUR
AU  - Carl L. DeVito
TI  - On Pták's Generalization of the Open-Mapping and Closed-Graph Theorems.
JO  - Mathematische Zeitschrift
PY  - 1988
SP  - 399
EP  - 406
VL  - 199
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1988__199_1_173975/
ID  - MZ_1988__199_1_173975
ER  -