TY  - JOUR
AU  - Ju.G. Koselev
TI  - On a multiplication  of semigroup varieties.
JO  - Semigroup forum
PY  - 1992
SP  - 1
EP  - 8
VL  - 45
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1992__45_3_135165/
LA  - en
ID  - SF_1992__45_3_135165
ER  -