@article{Ahrens2003,
  author    = {Ahrens, J.},
  title     = {First measurement of the helicity-dependent gamma p to p eta differential cross-section},
  series = {European Physical Journal},
  journal   = {European Physical Journal},
  number    = {A 17 (2)},
  pages     = {241 -- 244},
  year      = {2003},
  language  = {en}
}
@article{AhrensKiel2003,
  author    = {Ahrens, J. and Kiel, B.},
  title     = {Helicity dependence of the \&\#947;(pol.) p(pol.) \&\#8594; N\&\#960;+\&\#960;0 reaction in the second resonance region},
  series = {Phys. Lett. B551},
  journal   = {Phys. Lett. B551},
  pages     = {49 -- 55},
  year      = {2003},
  language  = {en}
}
@article{AhrensKiel2002,
  author    = {Ahrens, J. and Kiel, B.},
  title     = {Helicity Amplitudes A1/2 and A3/2 for the D13(1520) Resonance Obtained from the \&\#947;\&\#8407;p\&\#8407;\&\#8594;p\&\#960;0 Reaction},
  series = {Phys. Rev. Lett. 88},
  journal   = {Phys. Rev. Lett. 88},
  number    = {Art. No. 232002},
  year      = {2002},
  language  = {en}
}
@article{AhrensKiel2001,
  author    = {Ahrens, J. and Kiel, B.},
  title     = {First Measurement of the Gerasimov-Drell-Hearn Integral for 1H from 200 to 800 MeV},
  series = {Phys. Rev. Lett. 87},
  journal   = {Phys. Rev. Lett. 87},
  number    = {Art. No. 022003},
  year      = {2001},
  language  = {en}
}
@article{AhrensKiel2000,
  author    = {Ahrens, J. and Kiel, B.},
  title     = {Helicity Dependence of \&\#947;p \&\#8594; N\&\#960; below 450 MeV and Contribution to the Gerasimov-Drell-Hearn Sum Rule},
  series = {Phys. Rev. Lett. 84},
  journal   = {Phys. Rev. Lett. 84},
  pages     = {5950 -- 5954},
  year      = {2000},
  language  = {en}
}
@article{Ahrens2005,
  author    = {Ahrens, J.},
  title     = {Intermediate resonance excitation in the \&\#947;p\&\#8594;p\&\#960;0\&\#960;0 reaction},
  series = {Physics Letters},
  journal   = {Physics Letters},
  number    = {624},
  pages     = {173 -- 180},
  year      = {2005},
  language  = {en}
}
@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}
}