TY  - JOUR
AU  - Pták, Vlastimil
TI  - Openness of linear mappings in $LF$-spaces
JO  - Czechoslovak Mathematical Journal
PY  - 1969
SP  - 547
EP  - 552
VL  - 19
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100921/
DO  - 10.21136/CMJ.1969.100921
LA  - en
ID  - 10_21136_CMJ_1969_100921
ER  -