Materials science for high technologies : MASHTEC '90 : proceedings of the International Symposium held in Dresden, German Democtatic Republic April 24-27, 1990. Pt.2 pp.523-524, 1990. Aedermannnsdorf, Switzerland. Trans Tech Publications
Positron annihilation : ICPA-10 : Proceedings of the 10th International Conference on Positron Annihilation, May 23-29, 1994, Beijing, China. Part1 pp.399-402, 1995. Aederlmannsdorf, Switzerland. Trans Tech Publications
Positron annihilation : Proceedings of the 9th International Conference on Positron Annihilation, August 26-31, 1991, Szombathely, Hungary. Pt.2 pp.901-904, 1992. Aederlmannsdorf, Switzerland. Trans Tech Publications