TY  - JOUR
AU  - M.V. Lawson
TI  - Extending partial isomorphisms and McAlister's covering theorem.
JO  - Semigroup forum
PY  - 1994
SP  - 18
EP  - 27
VL  - 48
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1994__48_3_135293/
ID  - SF_1994__48_3_135293
ER  -