%0 Journal Article %A J. GaƂuszka %T Varieties of idempotent groupoids with small clones %J Colloquium Mathematicum %D 1999 %P 63-87 %V 81 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-81-1-63-87/ %R 10.4064/cm-81-1-63-87 %G en %F 10_4064_cm_81_1_63_87