%0 Journal Article %A Hoo, Cheong Seng %A Shum, Kar-Ping %T On compact $N$-semigroups %J Czechoslovak Mathematical Journal %D 1974 %P 552-562 %V 24 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1974.101274/ %R 10.21136/CMJ.1974.101274 %G en %F 10_21136_CMJ_1974_101274