TY - JOUR AU - D.H. Jakubassa-Amundsen TI - Localization of the essential spectrum for relativistic $N$-electron ions and atoms JO - Documenta mathematica PY - 2005 SP - 417 EP - 445 VL - 10 UR - http://geodesic.mathdoc.fr/articles/10.4171/dm/196/ DO - 10.4171/dm/196 ID - 10_4171_dm_196 ER -