1. The earliest theoretical studies appear to be due to A. Liénard, L’Eclairage Electrique, 16(1898)5.
2. H. Winick and S. Doniach, in H. Winick and S. Doniach (Eds.), Synchrotron Radiation Research, Plenum New York, 1980, pp 1.
3. Synchrotron Radiation News, published six times per year by Gordon and Breach Science Publishers, New York.
4. C.J. Hirschmugl, G.P. Williams, F.M. Hoffmann and Y.J. Chabal, Phys. Rev. Lett., 65 (1990) 480.
5. see e.g. J.C. Bertolini and B. Tardy, Surface Sci., 102 (1981) 131.