%0 Journal Article
%A Donald J. Collins
%T Presentations of the Amalgamated Free Product of two Infinite Cycles.
%J Mathematische Annalen
%D 1978
%P 233-242
%V 237
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1978__237_182789/
%F MAN_1978__237_182789