TY - JOUR AU - H. Mildenberg TI - A rigid Boolean algebra that admits the elimination of Q21 JO - Fundamenta Mathematicae PY - 1993 SP - 1 EP - 18 VL - 142 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-142-1-1-18/ DO - 10.4064/fm-142-1-1-18 LA - en ID - 10_4064_fm_142_1_1_18 ER -