@article{VeldkampErkoGudatetal.1999,
  author    = {Markus Veldkamp and Alexei Erko and Wolfgang Gudat and Nikolai V. Abrosimov and Volker Alex and Salavat Khasanov and Frank Neissendorfer and Ullrich Pietsch and Veniamin Shekhtman},
  title     = {Si(1-x)Ge(x) laterally graded crystals as monochromators for X-Ray absorption spectroscopy studies},
  year      = {1999},
}