TY  - JOUR
AU  - Rastislav Telgársky
TI  - Closure-preserving covers
JO  - Fundamenta Mathematicae
PY  - 1974
SP  - 165
EP  - 175
VL  - 85
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-85-2-165-175/
DO  - 10.4064/fm-85-2-165-175
LA  - en
ID  - 10_4064_fm_85_2_165_175
ER  -