MEDIUM TEMPERATURE PEAKS IN HIGH PURITY ALUMINIUM DOPED WITH 10 ppm COPPER OR SILVER C. ESNOUF, A. KULIK, J.F. THEUMANN et M.L. NO J. Phys. Colloques, 48 C8 (1987) C8-95-C8-100 DOI: 10.1051/jphyscol:1987810