%0 Journal Article %A Kepka, Tomáš %T A note on associative triples of elements in cancellation groupoids %J Commentationes Mathematicae Universitatis Carolinae %D 1980 %P 479-487 %V 21 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1980__21_3_a6/ %G en %F CMUC_1980__21_3_a6