1. Ahlgren, M., Rodmar, M., Klein, T., Rapp, O. (1995): Phys.Rev. B 51, 7287
2. Ahlgren, M., Rodmar, M., Sommer, M., Rapp, O. (1996a): J. Non-Cryst. Solids 205–207, 21
3. Ahlgren, M., Rodmar, Brangefält, J., Berger, C., Gignoux, C., Rapp, O. (1996b): Czech. J. Phys. 46, 1989
4. Ahlgren, M., Rodmar, M., Gignoux, C., Berger, C., Rapp, O. (1997a): Mater. Sci. Eng. A 226–228, 981
5. Ahlgren, M., Gignoux, C., Rodmar, M., Berger, C., Rapp, O. (1997b): Phys. Rev. B 55, R11 915