Positron annihilation : Proceedings of the 9th International Conference on Positron Annihilation, August 26-31, 1991, Szombathely, Hungary. Pt.3 pp.1435-1438, 1992. Aederlmannsdorf, Switzerland. Trans Tech Publications
Defects in semiconductors, icds-19 : proceedings of the 19th International Conference on Defects in Semiconductors, Aveiro, Portugal, July 1997. Part2 pp.709-714, 1997. Zurich, Switzerland. Trans Tech Publications
Positron annihilation : Proceedings of the 9th International Conference on Positron Annihilation, August 26-31, 1991, Szombathely, Hungary. Pt.3 pp.1439-1442, 1992. Aederlmannsdorf, Switzerland. Trans Tech Publications
Positron annihilation : Proceedings of the 9th International Conference on Positron Annihilation, August 26-31, 1991, Szombathely, Hungary. Pt.1 pp.301-308, 1992. Aederlmannsdorf, Switzerland. Trans Tech Publications