TY  - JOUR
AU  - L. Márki
AU  - O. Steinfeld
TI  - A generalization of Green's relations in semigroups.
JO  - Semigroup forum
PY  - 1974
SP  - 74
EP  - 85
VL  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1974__7_134002/
ID  - SF_1974__7_134002
ER  -