@article{BittmannBadtkeSchmidt1996,
  author    = {Bittmann, Frank and Badtke, Gernot and Schmidt, Ottmar},
  title     = {Behavior of the spinal column in a long-distance runner},
  year      = {1996},
  language  = {en}
}
@article{BadtkeBittmannSchmidt1995,
  author    = {Badtke, Gernot and Bittmann, Frank and Schmidt, Ottmar},
  title     = {Bewegungsverhalten der Wirbels{\"a}ule beim Ausdauerlauf},
  year      = {1995},
  language  = {de}
}
@article{BittmannBadtkeAmelungetal.1994,
  author    = {Bittmann, Frank and Badtke, Gernot and Amelung, Peter and Schmidt, Ottmar},
  title     = {Das Verhalten der Wirbels{\"a}ule bei Ausdauerbelastung},
  year      = {1994},
  language  = {de}
}
@article{BittmannBadtkeSchmidt1998,
  author    = {Bittmann, Frank and Badtke, Gernot and Schmidt, Ottmar},
  title     = {On the kinematic behaviour of the pelvis and shoulde axis as well as the height of the spine during long distance running},
  year      = {1998},
  language  = {en}
}
@article{BittmannBadtkeSchmidt1997,
  author    = {Bittmann, Frank and Badtke, Gernot and Schmidt, Ottmar},
  title     = {Zum kinematischen Verhalten von Becken- und Schulterachse sowie Wirbels{\"a}ulenl{\"a}nge beim Langstreckenlauf},
  year      = {1997},
  language  = {de}
}
@phdthesis{Schmidt1998,
  author    = {Schmidt, Ottmar},
  title     = {Zur Belastung der Wirbels{\"a}ule : eine empirische Studie am Beispiel des Langstreckenlaufs},
  address   = {Potsdam},
  pages     = {V, 120 Bl. : graph. Darst.},
  year      = {1998},
  language  = {de}
}