Halm, I., H.-J. Wiebicke, U. Geppert, F. E. Christensen, S. Abdali and H. W. Schnopper: Analysis of rocking curve measurements of LIF flight crystals for the objective crystal spectrometer on SPECTRUM-X-GAMMA. In: EUV, x-ray, and gamma-ray instrumentation for astronomy IV, (Eds.) Oswald H. W. Siegmund. Proceedings of SPIE 2006. SPIE, Bellingham (1993) 11-21.