%0 Journal Article %A Zapletal, Josef %T Distinguishing subsets in semilattices %J Archivum mathematicum %D 1973 %P 73-82 %V 9 %N 2 %U http://geodesic.mathdoc.fr/item/ARM_1973_9_2_a4/ %G en %F ARM_1973_9_2_a4