TY - JOUR AU - A. Abian TI - k-inductive Boolean algebras and the existence of special ultrafilters JO - Commentationes Mathematicae PY - 1980 SP - 1 EP - 3 VL - 21 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v21i1.5956/ DO - 10.14708/cm.v21i1.5956 LA - pl ID - 10_14708_cm_v21i1_5956 ER -