TY  - JOUR
AU  - E.M. Norris
TI  - The structure of an idempotent relation.
JO  - Semigroup forum
PY  - 1979
SP  - 319
EP  - 330
VL  - 18
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1979__18_134362/
ID  - SF_1979__18_134362
ER  -