%0 Journal Article %A D.C.J. Burgess %A R. McFadden %T Systems of ideals in partially ordered semigroups. %J Mathematische Zeitschrift %D 1962 %P 439-450 %V 79 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1962__79_170080/ %F MZ_1962__79_170080