%0 Journal Article %A G. Grätzer %A A. Kisielewicz %A B. Wolk %T An equational basis in four variables for the three-element tournament %J Colloquium Mathematicum %D 1992 %P 41-44 %V 63 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-63-1-41-44/ %R 10.4064/cm-63-1-41-44 %G en %F 10_4064_cm_63_1_41_44