TY  - JOUR
AU  - Chvalina, Jan
TI  - Concerning a non-realizability of connected compact semi-separated closure operations by set-systems
JO  - Archivum mathematicum
PY  - 1976
SP  - 45
EP  - 51
VL  - 12
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ARM_1976__12_1_a6/
LA  - en
ID  - ARM_1976__12_1_a6
ER  -