Off-Centering of Pb and Sn Impurities in GeTe Induced by Strong Local Stress A. I. Lebedev, I. A. Sluchinskaya, V. N. Demin et I. H. MunroJ. Phys. IV France, 7 C2 (1997) C2-1159-C2-1160DOI: https://doi.org/10.1051/jp4:19972172