%0 Journal Article
%A Humphries, Stephen P.
%T Normal closures of powers of Dehn twists in mapping class groups
%J Glasgow mathematical journal
%D 1992
%P 314-317
%V 34
%N 3
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008879/
%R 10.1017/S0017089500008879
%F 10_1017_S0017089500008879