%0 Journal Article %A Trch, Milan %T Groupoids and the associative law. VII. Semigroup distance of SH-groupoids %J Acta Universitatis Carolinae. Mathematica et Physica %D 2006 %P 57-63 %V 47 %N 1 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/AUCMP_2006__47_1_a3/ %G en %F AUCMP_2006__47_1_a3