TY  - JOUR
AU  - A.N. Trahtman
TI  - The varieties of n-testable semigroups.
JO  - Semigroup forum
PY  - 1983
SP  - 309
EP  - 318
VL  - 27
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1983__27_134628/
ID  - SF_1983__27_134628
ER  -