%0 Journal Article
%A Robert Brooks
%T The fundamental group and the spectrum of the Laplacian.
%J Commentarii mathematici Helvetici
%D 1981
%P 581-598
%V 56
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1981__56_139885/
%F CMH_1981__56_139885