TY  - JOUR
AU  - Matoušek, Milan
AU  - Pták, Pavel
TI  - Symmetric difference on orthomodular lattices and $Z_2$-valued states
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 2009
SP  - 535
EP  - 547
VL  - 50
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_2009__50_4_a3/
LA  - en
ID  - CMUC_2009__50_4_a3
ER  -