Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1990__65_3_140215, author = {Paul Schmutz}, title = {Small eigenvalues on {Y-pieces} and on {Riemann} surfaces.}, journal = {Commentarii mathematici Helvetici}, pages = {603--614}, publisher = {mathdoc}, volume = {65}, number = {3}, year = {1990}, zbl = {0752.53026}, url = {http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140215/} }
Paul Schmutz. Small eigenvalues on Y-pieces and on Riemann surfaces.. Commentarii mathematici Helvetici, Tome 65 (1990) no. 3, pp. 603-614. http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140215/