Raman scattering and local order in GexSe 1 -x glasses for 1/3 ≤ x ≤ 1/2 P. Tronc, M. Bensoussan, A. Brenac, G. Errandonea et C. Sebenne J. Phys. France, 38 12 (1977) 1493-1498 DOI: 10.1051/jphys:0197700380120149300