@article{GDZPPN002438070,
title = {Small eigenvalues of Riemann surfaces and graphs.},
journal = {Mathematische Zeitschrift},
volume = {205},
year = {1990},
pages = {395-420},
zbl = {0729.58050},
url = {http://dml.mathdoc.fr/item/GDZPPN002438070}
}
Burger, Marc. Small eigenvalues of Riemann surfaces and graphs.. Mathematische Zeitschrift, Tome 205 (1990) pp. 395-420. http://gdmltest.u-ga.fr/item/GDZPPN002438070/