%0 Journal Article %A O'Carroll, Liam %T Inverse semigroups as extensions of semilattices %J Glasgow mathematical journal %D 1975 %P 12-21 %V 16 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002445/ %R 10.1017/S0017089500002445 %F 10_1017_S0017089500002445