%0 Journal Article %A Magill, Kenneth D., Jr. %T On the ideals of the semigroup of the 1-sphere %J Czechoslovak Mathematical Journal %D 1989 %P 248-261 %V 39 %N 2 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1989.102300/ %R 10.21136/CMJ.1989.102300 %G en %F 10_21136_CMJ_1989_102300