%0 conference lecture %@ %A Haubold, S., Magerl, A., Hock, R., Liss, K.-D., Lorenzen, M., Requardt, H., Krisch, M., Mitschke, M. %D 2002 %J X-Top 2002 %T Silikon Crystal Cavities in Backscattering Geometry: The 8-Beam Condition of Si 888 %U %X