%0 Journal Article %A Day, Alan %T Filter Monads, Continuous Lattices and Closure Systems %J Canadian journal of mathematics %D 1975 %P 50-59 %V 27 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-008-8/ %R 10.4153/CJM-1975-008-8 %F 10_4153_CJM_1975_008_8