%0 Journal Article
%A F. Bachmann
%A L. Grünenfelder
%T Homological Methods and the Third Dimension Subgroup
%J Commentarii mathematici Helvetici
%D 1972
%P 526-531
%V 47
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1972__47_139531/
%F CMH_1972__47_139531