Low frequency Raman scattering from surface vibrational modes and size of microheterogenities in an amorphous matrix K. E. LIPINSKA-KALITA, G. MARIOTTO et A. FONTANAJ. Phys. IV France, 04 C4 (1994) C4-469-C4-472DOI: https://doi.org/10.1051/jp4:19944112