%0 Journal Article %A Diego, António %A Suárez, Alberto %T Two sets of axioms for Boolean algebras %J Portugaliae mathematica %D 1964 %P 139-145 %V 23 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1964__23_3_114925/ %G en %F PORMA_1964__23_3_114925