TY - JOUR AU - Krzysztof NowiƄski TI - Extension of closed mappings JO - Fundamenta Mathematicae PY - 1974 SP - 9 EP - 17 VL - 85 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-85-1-9-17/ DO - 10.4064/fm-85-1-9-17 LA - en ID - 10_4064_fm_85_1_9_17 ER -