1. Shechtman, D., Blech, I., Gratias, D. & Cahn, J.W. Phys. Rev. Lett. 53, 1951 (1984).
2. Dubost, B., Lang, J.M., Tanaka, M., Sainfort, P. & Audier, M. Nature 324, 48 (1986).
3. Lang, J.M., Audier, M., Dubost, B. & Sainfort, P. J. Cryst. Growth (in the press).
4. Denoyer, F., Heger, G., Lambert, M. & Lang, J.M. C.R. Acad. Sc. Seance (in the press).
5. Hauser, J.J., Chen, H.S. & Waszczak, J.V. Phys. Rev. B33, 3577 (1986).