%0 Journal Article %A Heleyová, Zuzana %T Congruences on pseudocomplemented semilattices %J Discussiones Mathematicae. General Algebra and Applications %D 2000 %P 219-231 %V 20 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGAA_2000_20_2_a6/ %G en %F DMGAA_2000_20_2_a6