%0 Journal Article
%A R.P. Osborne
%A H. Zieschang
%T Primitives in the Free Group on Two Generators.
%J Inventiones mathematicae
%D 1981
%P 17-24
%V 63
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1981__63_142788/
%F IM_1981__63_142788