@article{escidoc:0719,
  title = {{Magnetic field optimization of permanent magnet unulators for arbitrary polarization}},
  journal = {{Nuclear Instruments and Methods in Physics Research A}},
  volume = {516},
  pages = {575--585},
  year = {2004},
  slug = {escidoc-0719},
  author = {Bahrdt, J. and Frentrup, W. and Gaupp, A. and Scheer, M. and Englisch, U.}
}