TY  - JOUR
AU  - Paul Schmutz
TI  - Small eigenvalues on Y-pieces and on Riemann surfaces.
JO  - Commentarii mathematici Helvetici
PY  - 1990
SP  - 603
EP  - 614
VL  - 65
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140215/
ID  - CMH_1990__65_3_140215
ER  -