TY  - JOUR
AU  - M.V. Lawson
TI  - Congruences on ordered groupoids.
JO  - Semigroup forum
PY  - 1993
SP  - 150
EP  - 167
VL  - 47
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1993__47_2_135266/
ID  - SF_1993__47_2_135266
ER  -