TY  - JOUR
AU  - J. Justin
AU  - G. Pirillo
TI  - Comments on the permutation property for semigroups.
JO  - Semigroup forum
PY  - 1989
SP  - 109
EP  - 112
VL  - 39
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1989__39_2_134980/
ID  - SF_1989__39_2_134980
ER  -