%0 Journal Article %A Novotný, Miroslav %T Ternary structures and groupoids %J Czechoslovak Mathematical Journal %D 1991 %P 90-98 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102437/ %R 10.21136/CMJ.1991.102437 %G en %F 10_21136_CMJ_1991_102437