%0 Journal Article %A Hansen, Donald Joseph %T Pseudo-complemented distributive groupoids %J Czechoslovak Mathematical Journal %D 1991 %P 141-148 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102444/ %R 10.21136/CMJ.1991.102444 %G en %F 10_21136_CMJ_1991_102444