TY - JOUR AU - R. Shortt TI - Normal subgroups of measurable automorphisms JO - Fundamenta Mathematicae PY - 1990 SP - 177 EP - 187 VL - 135 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-135-3-177-187/ DO - 10.4064/fm-135-3-177-187 LA - en ID - 10_4064_fm_135_3_177_187 ER -