HIGH ENERGY SPECTROSCOPIES OF Cu COMPOUNDS, INCLUDING THE NEW SUPERCONDUCTORS M. GRIONI, J.C. FUGGLE, P.J.W. WEIJS, J.B. GOEDKOOP, G. ROSSI, F. SCHAEFERS, J. FINK et N. NÜCKER J. Phys. Colloques, 48 C9 (1987) C9-1189-C9-1192 DOI: 10.1051/jphyscol:19879214