TY  - JOUR
AU  - Robert Brooks
TI  - The fundamental group and the spectrum of the Laplacian.
JO  - Commentarii mathematici Helvetici
PY  - 1981
SP  - 581
EP  - 598
VL  - 56
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1981__56_139885/
ID  - CMH_1981__56_139885
ER  -