HEAT RELAXATION PHENOMENA AT VERY LOW TEMPERATURE AND SPECIFIC HEAT OF THE AMORPHOUS SUPERCONDUCTOR La0.78Zn0.22 A. Ravex, J.C. Lasjaunias et D. Thoulouze J. Phys. Colloques, 41 C8 (1980) C8-749-C8-750 DOI: 10.1051/jphyscol:19808186