HEAT TRANSFER BETWEEN SAPPHIRE (Al2O3 : Fe3+) AND DILUTE 3He AT VERY LOW TEMPERATURE M. Chapellier, M. Chiba et M. Rotter J. Phys. Colloques, 39 C6 (1978) C6-271-C6-272 DOI: 10.1051/jphyscol:19786120