TY  - JOUR
AU  - Margolis, S. W.
AU  - Meakin, J. C.
AU  - Stephen, J. B.
TI  - Free Objects in Certain Varieties of Inverse Semigroups
JO  - Canadian journal of mathematics
PY  - 1990
SP  - 1084
EP  - 1097
VL  - 42
IS  - 6
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-058-9/
DO  - 10.4153/CJM-1990-058-9
ID  - 10_4153_CJM_1990_058_9
ER  -