%0 Journal Article %A Hoffmann, Michael %A Thomas, Richard M. %T Automaticity and commutative semigroups %J Glasgow mathematical journal %D 2002 %P 167-176 %V 44 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089502010121/ %R 10.1017/S0017089502010121 %F 10_1017_S0017089502010121