%0 Journal Article
%A Scott Wolpert
%T An elementary formula for the Fenchel-Nielsen twist.
%J Commentarii mathematici Helvetici
%D 1981
%P 132-135
%V 56
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1981__56_139861/
%F CMH_1981__56_139861