1. Müller, G.O. (1993) In Solid State Luminescence (ed. A.H. Kitai), Chapman & Hall, London, Chapter 5.
2. Miller, M.R. and Kelley, T.G. (1989) In Electroluminescence, Springer Proceedings in Physics, Vol. 38, Springer, Heidelberg, pp. 259–263.
3. Müller, G.O., Mach, R, Reinsperger, G.-U. and Schrottke, L. (1991) SID 91 Tech. Digest, p. 567.
4. Uchiike, H. (1989) Electroluminescence, Springer Proceedings in Physics, Vol. 38, Springer, Heidelberg, pp. 238–245.
5. Müller, G.O. and Mach, R. (1993) Phys. Stat. Sol. Submitted.