TY - JOUR AU - Lutz Heindorf TI - Strongly retractive Boolean algebras JO - Fundamenta Mathematicae PY - 1985 SP - 253 EP - 259 VL - 126 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-126-3-253-259/ DO - 10.4064/fm-126-3-253-259 LA - en ID - 10_4064_fm_126_3_253_259 ER -