Halide glasses : proceedings of the Fourth International Symposium on Halide Glasses, held in Monterey, California, U.S.A., 26-29 January 1987. Pt.2 pp.447-452, 1987. Aedermannsdorf, Switzerland. Trans Tech Publications
Halide glasses VI : proceedings of the 6th International Symposium on Halide Glasses, held at Technical University of Clausthal, Germany, October 1-5, 1989. pp.431-436, 1991. Switzerland. Trans Tech Publications
Halide glasses VI : proceedings of the 6th International Symposium on Halide Glasses, held at Technical University of Clausthal, Germany, October 1-5, 1989. pp.413-418, 1991. Switzerland. Trans Tech Publications