TY - JOUR AU - D. Fremlin TI - On the average of inner and outer measures JO - Fundamenta Mathematicae PY - 1991 SP - 9 EP - 15 VL - 139 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-139-1-9-15/ DO - 10.4064/fm-139-1-9-15 LA - en ID - 10_4064_fm_139_1_9_15 ER -