%0 Journal Article %A Ježek, Jaroslav %T Definability for equational theories of commutative groupoids %J Czechoslovak Mathematical Journal %D 2012 %P 305-333 %V 62 %N 2 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.1007/s10587-012-0032-7/ %R 10.1007/s10587-012-0032-7 %G en %F 10_1007_s10587_012_0032_7