%0 Journal Article %A Trch, Milan %T Groupoids and the associative law VIIA. (SH-groupoids of type (A, B, A) and their semigroup distances) %J Acta Universitatis Carolinae. Mathematica et Physica %D 2007 %P 43-54 %V 48 %N 1 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/AUCMP_2007__48_1_a3/ %G en %F AUCMP_2007__48_1_a3