@article{AhrensKiel2004,
  author    = {Ahrens, J. and Kiel, B.},
  title     = {Helicity dependence of the \&\#947; p-> N \&\#960; channels and multipole analysis in the \&\#916; region},
  series = {European Physical Journal},
  journal   = {European Physical Journal},
  number    = {A 21},
  pages     = {323 -- 333},
  year      = {2004},
  language  = {en}
}
@article{NaumannAntonBocketal.2003,
  author    = {Naumann, J. and Anton, G. and Bock, A. and Grabmayr, P. and Helbing, K. and Kiel, B. and Menze, D. and Michel, T. and Proff, S. and Sauer, M. and Schumacher, M. and Speckner, T. and Weihofen, W. and Zeitle, G.},
  title     = {A photon tagging system for the GDH-Experiment at ELSA},
  series = {Nuclear Instruments and Methods in Physics Research},
  journal   = {Nuclear Instruments and Methods in Physics Research},
  number    = {A 498},
  pages     = {211 -- 219},
  year      = {2003},
  language  = {en}
}