@article{05142614,
title = {New bounds for the principal Dirichlet eigenvalue of planar regions.},
journal = {Experimental Mathematics},
volume = {15},
year = {2006},
pages = {333-342},
doi = {10.1080/10586458.2006.10128966},
zbl = {1180.35388},
language = {en},
url = {http://dml.mathdoc.fr/item/05142614}
}
Antunes, Pedro; Freitas, Pedro. New bounds for the principal Dirichlet eigenvalue of planar regions.. Experimental Mathematics, Tome 15 (2006) pp. 333-342. doi : 10.1080/10586458.2006.10128966. http://gdmltest.u-ga.fr/item/05142614/