TY  - JOUR
AU  - Billhardt, Bernd
TI  - Extensions of semilattices by left type-A semigroups
JO  - Glasgow mathematical journal
PY  - 1997
SP  - 7
EP  - 16
VL  - 39
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500031840/
DO  - 10.1017/S0017089500031840
ID  - 10_1017_S0017089500031840
ER  -