ed. by F. Beleznay.European Physical Society, Condensed Matter Division：Proceedings of the 8th general conference of the ..., Budapest, 1988.Royal Swedish Academy of Science,1989.
ed. by J. Friedel, J. P. Laheurte, J. P. Romagnan.European Physical Society, Condensed Matter Division：Proceedings of the 9th general conference of the ... , Nice, 1989.Royal Swedish Academy of Science,1989.
