%0 Journal Article
%A Jonathan A. Hillman
%T Two-knot groups with torsion free abelian normal subgroups of rank two.
%J Commentarii mathematici Helvetici
%D 1988
%P 664-671
%V 63
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1988__63_4_140138/
%F CMH_1988__63_4_140138