RESONANT RAMAN SCATTERING OF 23 cm-1 PHONONS BY Dy3+ IONS IN LaF3 S. S. Yom, R. S. Meltzer et J. E. RivesJ. Phys. Colloques, 46 C7 (1985) C7-247-C7-251DOI: https://doi.org/10.1051/jphyscol:1985745