1. Proceedings ESRF Users’ Meeting, Grenoble, France, 20–22 March, 1989.
2. L. Zhang (private communication).
3. J. Susini, G. Forstner, L. Zhang, C. Boyer, and R. Ravelet, these proceedings.
4. J. Susini, G. Marot, L. Zhang, P. Jagourel, and R. Ravelet, these proceedings.
5. G. Forstner and M. Krisch (private communication).