@article{05381033,
title = {The spectrum of the Laplacian on the warped products of Riemannian manifolds.},
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {49},
year = {2008},
pages = {23-42},
zbl = {1164.58319},
language = {en},
url = {http://dml.mathdoc.fr/item/05381033}
}
Glotko, N.V. The spectrum of the Laplacian on the warped products of Riemannian manifolds.. Sibirskij Matematicheskij Zhurnal, Tome 49 (2008) pp. 23-42. http://gdmltest.u-ga.fr/item/05381033/