@article{DMGAA_2000_20_2_a6,
     author = {Heleyov\'a, Zuzana},
     title = {Congruences on pseudocomplemented semilattices},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {219--231},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2000_20_2_a6/}
}