TY  - JOUR
AU  - E.D. Ljapin
TI  - Identities valid globally in semigroups.
JO  - Semigroup forum
PY  - 1982
SP  - 263
EP  - 270
VL  - 24
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1982__24_134551/
ID  - SF_1982__24_134551
ER  -