%0 Journal Article %A D.H. Jakubassa-Amundsen %T Localization of the essential spectrum for relativistic $N$-electron ions and atoms %J Documenta mathematica %D 2005 %P 417-445 %V 10 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/196/ %R 10.4171/dm/196 %F 10_4171_dm_196