1. R. Medenwaldt, C. David, N. Hertel, and E. Uggerhøj, p.323 in X-Ray Microscopy IV, Proceedings of the 4-th International Conference (Chernogolovka, Russia, 1994).
2. J. Thieme, C. David, N. Fay, B. Kaulich, R. Medenwaldt, M. Hettwer, P. Guttmann, U. Kögler, J. Maser, G. Schneider, D. Rudolph, and G. Schmahl, p.487 in X-Ray Microscopy IV, Proceedings of the 4-th International Conference (Chernogolovka, Russia, 1994).
3. R. Medenwaldt and M. Hettwer, J.X-ray Sci.Technol. 5, 202–206 (1995).
4. F. Vollrath, T. Holtet, H.C. Thøgersen and S. Frische, Proc. R. Soc. Lond. B, 263, 147–151 (1996).
5. JV. Abraham, Ph.D. Thesis, Manchester University, (1994).