FRACTONS AND THE HOMOGENEOUS LINEWIDTH OF THE 5D0 - 7F0 TRANSITION IN Eu3+-DOPED GLASSES G.S. Dixon, R.C. Powell and X. Gang J. Phys. Colloques, 46 C7 (1985) C7-331-C7-335 DOI: 10.1051/jphyscol:1985760