%0 Journal Article
%A Donald J. Collins
%A Zieschang Heiner
%T Rescuing the Whitehead Method for Free Products, I: Peak Reduction.
%J Mathematische Zeitschrift
%D 1984
%P 487-504
%V 185
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1984__185_173416/
%F MZ_1984__185_173416