TY  - JOUR
AU  - M. Petrich
TI  - A simple construction of semigroups all of whose subsemigroups are left ideals.
JO  - Semigroup forum
PY  - 1972
SP  - 262
EP  - 266
VL  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1972__4_133904/
ID  - SF_1972__4_133904
ER  -