TY  - JOUR
AU  - Šmarda, Bohumil
TI  - Polarity compatible with a closure system
JO  - Czechoslovak Mathematical Journal
PY  - 1979
SP  - 13
EP  - 20
VL  - 29
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1979.101574/
DO  - 10.21136/CMJ.1979.101574
LA  - en
ID  - 10_21136_CMJ_1979_101574
ER  -