TY  - JOUR
AU  - R. McFadden
AU  - J.M. Howie
TI  - Ideals are greater on the left.
JO  - Semigroup forum
PY  - 1990
SP  - 247
EP  - 248
VL  - 40
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1990__40_1_135023/
ID  - SF_1990__40_1_135023
ER  -