LATTICE DYNAMICS OF THE HEAVY FERMION COMPOUND UBe13 J.M. TRANQUADA, S.M. HEALD, M.A. PICK, Z. FISK et J.L. SMITH J. Phys. Colloques, 47 C8 (1986) C8-937-C8-941 DOI: 10.1051/jphyscol:19868180