@article{GDZPPN002329476,
title = {On the Essential Spectrum of Schr\"odinger Operators with Spherically Symmetric Potentials.},
journal = {Mathematische Annalen},
volume = {277},
year = {1987},
pages = {197-208},
zbl = {0629.35028},
url = {http://dml.mathdoc.fr/item/GDZPPN002329476}
}
Kalf, Hubert; Hempel, Rainer; Hinz, Andreas M. On the Essential Spectrum of Schrödinger Operators with Spherically Symmetric Potentials.. Mathematische Annalen, Tome 277 (1987) pp. 197-208. http://gdmltest.u-ga.fr/item/GDZPPN002329476/