1. Cosito, G., Coginilato, L., Modone, E., and Parisi, G., Fluorine in MCVD Optical Fibers, J. Non-Cryst. Solids, 1987, vol. 93, pp. 296–302.
2. Marshall, A. and Hallam, K.R., Fluorine Doping and Etching Reactions of Freon-12 in Optical Fiber Manufacture, Tech. Dig. IOOC-ECOC’85, Venezia, Italy, 1985, pp. 73–76.
3. Marshall, A., Irven, J., Boag, N., and Brooke, B.N., Mechanism of Fluorine Dopant Incorporation in Optical Fibers, Proc. 10th ECOC Conf., Stuttgart, Germany, 1984, pp. 76–77.
4. Kirchhof, J., Kleinert, P., Unger, S., and Funke, A., About the Fluorine Chemistry in MCVD: the Influence of Fluorine Doping on SiO2 Deposition, Cryst. Res. Technol., 1986, vol. 21, no. 11, pp. 1437–1444.
5. Kirchhof, J., Unger, S., Knappe, B. et al., About the Fluorine Chemistry in MCVD: the Mechanism of Fluorine Incorporation in SiO2 Layers, Cryst. Res. Technol., 1987, vol. 22, no. 4, pp. 495–501.