@article{02230434,
title = {Localization of the essential spectrum for relativistic },
journal = {Documenta Mathematica},
volume = {10},
year = {2005},
pages = {417-445},
zbl = {1075.81026},
language = {en},
url = {http://dml.mathdoc.fr/item/02230434}
}
Jakubassa-Amundsen, D.H. Localization of the essential spectrum for relativistic . Documenta Mathematica, Tome 10 (2005) pp. 417-445. http://gdmltest.u-ga.fr/item/02230434/