@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/