@article{ErdmannNolteNoltemeieretal.2001,
  author    = {Erdmann, A. and Nolte, A. and Noltemeier, A. and Schrader, R.},
  title     = {Modeling and Solving an Airline Schedule Generation Problem},
  series = {Annals of Operations Research},
  volume    = {107},
  journal   = {Annals of Operations Research},
  pages     = {117 -- 142},
  year      = {2001},
  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}
}