%0 Journal Article %A Hofer, Robert D. %T Restrictive Semigroups of Continuous Functions on 0-Dimensional Spaces %J Canadian journal of mathematics %D 1972 %P 598-611 %V 24 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-054-1/ %R 10.4153/CJM-1972-054-1 %F 10_4153_CJM_1972_054_1