TY  - JOUR
AU  - Trch, Milan
TI  - Groupoids and the associative law IIIA. (Primitive extensions of SH-groupoids and their semigroup distances)
JO  - Acta Universitatis Carolinae. Mathematica et Physica
PY  - 2009
SP  - 73
EP  - 82
VL  - 50
IS  - 1
PB  - mathdoc
UR  - https://geodesic-test.mathdoc.fr/item/AUCMP_2009__50_1_a5/
LA  - en
ID  - AUCMP_2009__50_1_a5
ER  -