TY - JOUR AU - S. Mrówka TI - On the ideals' extension theorem and its equivalence to the axiom of choice JO - Fundamenta Mathematicae PY - 1956 SP - 46 EP - 49 VL - 43 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-43-1-46-49/ DO - 10.4064/fm-43-1-46-49 LA - en ID - 10_4064_fm_43_1_46_49 ER -