1. W. Brefeld, P. Gurtler, in: S. Ebashi, M. Koch, E. Rubenstes (Eds.), Handbook of Synchrotron Radiation, vol. 4, North Holland, Amsterdam, 1991 (Chapter 7).
2. http://www.esrf.fr/.
3. http://www.aps.anl.gov/http://www.aps.anl.gov/.
4. http://www.spring8.or.jp/http://www.spring8.or.jp/.
5. Surface Studies of Solids by Total Reflection of X-Rays