Kaindl, G.Schneider, W. D.Laubschat, C.Reihl, B.Martensson, N.2007-06-202007-06-202007-06-20198310.1016/0039-6028(83)90699-4https://infoscience.epfl.ch/handle/20.500.14299/8806Core Level Shifts and Valence Change at the Surface of Intermetallic Rare-Earth Systemstext::journal::journal article::research article