1. J. Feldhaus, E. Saldin, J. Schneider, E. Schneidmiller, M. Yurkov, Possible application of x-ray optical elements for reducing the spectral bandwidth of an x-ray sase fel. Opt. Commun. 140, 341 (1997)
2. E. Saldin, E. Schneidmiller, Y. Shvyd’ko, M. Yurkov, X-ray fel with a mev bandwidth. Nucl. Instrum. Methods Phys. Res. Sect A 475, 357 (2001)
3. J. Arthur et al., Linac Coherent Light Source (LCLS), Conceptual Design Report (SLAC, Stanford, CA, 2002)
4. M. Altarelli et al., XFEL: The European X-Ray Free-Electron Laser, Technical Design Report (DESY, Hamburg, 2009)
5. M. Yabashi, T. Ishikawa, XFEL/SPring-8 Beamline Technical Design Report Ver. 2.0 (RIKEN-JASRI XFEL Project Head, Office, 2010).