Positron annihilation, ICPA-11 : Proceedings of the 11th International Conference on Positron Annihilation, Kansas City, Missouri, USA, May 1997. pp.204-208, 1997. Zuerich, 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.951-956, 1997. Zurich, Switzerland. Trans Tech Publications