LOW-TEMPERATURE ACOUSTICAL PROPERTIES OF Na DOPED β-Al2O3 J.-Y. Prieur, P. Doussineau, C. Frenois, A. Levelut et R.G. Leisure J. Phys. Colloques, 42 C6 (1981) C6-33 DOI: 10.1051/jphyscol:1981608
