Structural approach of Ge-X, GeX2 -Ag2X (X=S,Se) glassy systems P. ARMAND, A. IBANEZ, H. DEXPERT, D. BITTENCOURT, D. RAOUX and E. PHILIPPOT J. Phys. IV France, 02 C2 (1992) C2-189-C2-194 DOI: 10.1051/jp4:1992227