%0 Journal Article %A Sobral, Manuela %T Absolutely closed spaces and categories of algebras %J Portugaliae mathematica %D 1990 %P 341-351 %V 47 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1990__47_4_115723/ %G en %F PORMA_1990__47_4_115723