Positron annihilation : ICPA-10 : Proceedings of the 10th International Conference on Positron Annihilation, May 23-29, 1994, Beijing, China. Part1 pp.403-406, 1995. Aederlmannsdorf, 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.407-410, 1995. Aederlmannsdorf, Switzerland. Trans Tech Publications
Shallow Impurities in Semiconductors : Proceedings of the Fifth International Conference on Shallow Impurities in Semiconductors "Physics and Control of Impurities", International Conference Center Kobe, Japan, 5 to 8 August, 1992. pp.165-170, 1993. Aedermannsdorf, 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.419-422, 1995. Aederlmannsdorf, Switzerland. Trans Tech Publications
Positron annihilation, ICPA-11 : Proceedings of the 11th International Conference on Positron Annihilation, Kansas City, Missouri, USA, May 1997. pp.430-432, 1997. Zuerich, Switzerland. Trans Tech Publications