TY  - JOUR
AU  - Simon, Petr
TI  - Covering of a space by nowhere dense sets
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1977
SP  - 755
EP  - 761
VL  - 18
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1977__18_4_a11/
LA  - en
ID  - CMUC_1977__18_4_a11
ER  -