%0 Journal Article %A R. Shortt %T Normal subgroups of measurable automorphisms %J Fundamenta Mathematicae %D 1990 %P 177-187 %V 135 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-135-3-177-187/ %R 10.4064/fm-135-3-177-187 %G en %F 10_4064_fm_135_3_177_187