%0 Journal Article
%A Trch, Milan
%T Groupoids and the associative law IIIA. (Primitive extensions of SH-groupoids and their semigroup distances)
%J Acta Universitatis Carolinae. Mathematica et Physica
%D 2009
%P 73-82
%V 50
%N 1
%I mathdoc
%U https://geodesic-test.mathdoc.fr/item/AUCMP_2009__50_1_a5/
%G en
%F AUCMP_2009__50_1_a5