1. Lynch, D.W.: Synchrotron radiation. In: Topics in Current Physics. Kunz, C. (ed.), Vol. 10, Chap. 7. Berlin, Heidelberg, New York: Springer-Verlag 1979
2. Sato, S., Miyahara, T., Hanyu, T., Yamaguchi, S., Ishii, T.: J. Phys. Soc. Jpn.47, 836 (1979)
3. Sonntag, B.: J. Phys (Paris)39, Suppl C4, 9 (1978)
4. Almbladh, C.-O., Hedin, L.: Handbook of synchrotron radiation. Koch, E.E. (ed.). Chap. 8. Amsterdam, New York, London: North-Holland 1983
5. Brown, F.C., Rustgi, O.P.: Phys. Rev. Lett.28, 497 (1972)