%0 Journal Article %A Wajnryb, Bronisław %T An elementary approach to the mapping class group of a surface %J Geometry & topology %D 1999 %P 405-466 %V 3 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.2140/gt.1999.3.405/ %R 10.2140/gt.1999.3.405 %F GT_1999_3_1_a16