@article{00894092,
title = {Eigenvalues of the negative Laplacian for arbitrary multiply connected domains.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {19},
year = {1996},
pages = {581-586},
doi = {10.1155/S0161171296000804},
zbl = {0852.35108},
language = {en},
url = {http://dml.mathdoc.fr/item/00894092}
}
Zayed, E.M.E. Eigenvalues of the negative Laplacian for arbitrary multiply connected domains.. International Journal of Mathematics and Mathematical Sciences, Tome 19 (1996) pp. 581-586. doi : 10.1155/S0161171296000804. http://gdmltest.u-ga.fr/item/00894092/