SUBSTITUTION EFFECTS ON THE MIXED VALENCE BEHAVIOUR OF Eu in EuCu2Si2 SUJATA PATIL, B.D. PADALIA, R. NAGARAJAN, L.C. GUPTA et R. VIJAYARAGHAVAN J. Phys. Colloques, 47 C8 (1986) C8-983-C8-986 DOI: 10.1051/jphyscol:19868189