%0 Journal Article %A A. Abian %T k-inductive Boolean algebras and the existence of special ultrafilters %J Commentationes Mathematicae %D 1980 %P 1-3 %V 21 %N 1 %U http://geodesic.mathdoc.fr/articles/10.14708/cm.v21i1.5956/ %R 10.14708/cm.v21i1.5956 %G pl %F 10_14708_cm_v21i1_5956