1. D.J. Thouless, p.5, E. Abrahams, p.9, F. Wegner, p.15, Phys. Reports 67 (1980)
2. D.J. Thouless, p.2, F.J. Wegner, p.8, S. Hikami, p.15, P. Wdlfle and D. Vollhardt, p.26, in Y. Nagaoka, H. Fukuyama (eds.) “Anderson Localization”, Springer Series in Solid-State Sciences 39 (1982)
3. F. Wegner, Z. Phys. B 35 (1979) 207
4. L. Schäfer, F. Wegner, Z. Phys. B 38 (1980) 113
5. F. Wegner, Z. Phys. B 49 (1983) 297