LATTICE DYNAMICS OF YAl2 AND LaAl2 - A FURTHER CONTRIBUTION TO THE La-Y PUZZLE C.T. Yeh, W. Reichardt, B. Renker, N. Nücker et M. Loewenhaupt J. Phys. Colloques, 42 C6 (1981) C6-371-C6-373 DOI: 10.1051/jphyscol:19816107