%0 Journal Article
%A D.B.A. Epstein
%T Commutators of C...-diffeomorphisms. Appendix to 
%J Commentarii mathematici Helvetici
%D 1984
%P 111-122
%V 59
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1984__59_139966/
%F CMH_1984__59_139966