TY  - JOUR
AU  - Drápal, Aleš
TI  - On a class of commutative groupoids determined by their associativity triples
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1993
SP  - 199
EP  - 201
VL  - 34
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1993__34_2_a0/
LA  - en
ID  - CMUC_1993__34_2_a0
ER  -