%0 Journal Article %A Dorninger, Dietmar %A Länger, Helmut %A Maczyński, Maciej %T Ring-like structures with unique symmetric difference related to quantum logic %J Discussiones Mathematicae. General Algebra and Applications %D 2001 %P 239-253 %V 21 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGAA_2001_21_2_a8/ %G en %F DMGAA_2001_21_2_a8