@article{DMGAA_2000_20_1_a7, author = {Chajda, Ivan and L\"anger, Helmut}, title = {Ring-like operations is pseudocomplemented semilattices}, journal = {Discussiones Mathematicae. General Algebra and Applications}, pages = {87--95}, publisher = {mathdoc}, volume = {20}, number = {1}, year = {2000}, language = {en}, url = {http://geodesic.mathdoc.fr/item/DMGAA_2000_20_1_a7/} }