TY  - JOUR
AU  - J. Dudek
TI  - A characterization of some idempotent abelian groupoids
JO  - Colloquium Mathematicum
PY  - 1974
SP  - 219
EP  - 223
VL  - 30
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-30-2-219-223/
DO  - 10.4064/cm-30-2-219-223
LA  - en
ID  - 10_4064_cm_30_2_219_223
ER  -