@article{GDZPPN002335743,
title = {Sharp polynomial bounds on the number of scattering poles for metric perturbations of the Laplacian in IRn.},
journal = {Mathematische Annalen},
volume = {291},
year = {1991},
pages = {39-50},
zbl = {0754.35105},
url = {http://dml.mathdoc.fr/item/GDZPPN002335743}
}
Vodev, Georgi. Sharp polynomial bounds on the number of scattering poles for metric perturbations of the Laplacian in IRn.. Mathematische Annalen, Tome 291 (1991) pp. 39-50. http://gdmltest.u-ga.fr/item/GDZPPN002335743/