1. Semiconductors and Semimetals 21; Volume Editor J.I. Pankove Academic Press 1984.
2. Physics of Hydrogenated Amorphous Silicon, Topics in Applied Physics; J.D. Joannopolous and G. Lucovsky, editors. Springer Verlag, Berlin 1984.
3. Proceedings of the XVIIth International Conference on the Physics of Semiconductors — San Francisco, Cal. 1984; Springer Verlag, Berlin 1985.
4. For proceedings of the latest conference see: Proceedings of the Xth International Conference on the Physics of Amorphous and Liquid Semiconductors — Rome 1985; Elsevier 1985.
5. P.W. Anderson, Phys. Rev. (1985) 109, 1492.