%0 Journal Article %A D.H. Jakubassa-Amundsen %T The projected single-particle Dirac operator for Coulombic potentials %J Documenta mathematica %D 2005 %P 331-356 %V 10 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/191/ %R 10.4171/dm/191 %F 10_4171_dm_191