TY  - JOUR
AU  - Sun, Shu Hao
TI  - The class of $\aleph$-spaces is invariant of closed mappings with Lindelöf fibres
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1988
SP  - 351
EP  - 354
VL  - 29
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1988__29_2_a17/
LA  - en
ID  - CMUC_1988__29_2_a17
ER  -