@article{BeckmannElbe2003,
  author    = {Beckmann, J{\"u}rgen and Elbe, Anne-Marie},
  title     = {Sportpsychologie},
  year      = {2003},
  language  = {de}
}
@article{BeckmannKellmann2003,
  author    = {Beckmann, J{\"u}rgen and Kellmann, Michael},
  title     = {Procedures and principles of sportpsychological assessment},
  year      = {2003},
  language  = {en}
}
@article{ElbeBeckmannSzymanski2003,
  author    = {Elbe, Anne-Marie and Beckmann, J{\"u}rgen and Szymanski, Birgit},
  title     = {Das Dropout Ph{\"a}nomen an Eliteschulen des Sports : ein Problem der Selbstregulation?},
  year      = {2003},
  language  = {de}
}
@article{ElbeBeckmannSzymanski2003,
  author    = {Elbe, Anne-Marie and Beckmann, J{\"u}rgen and Szymanski, Birgit},
  title     = {Wie entwickeln sich M{\"a}dchen an einer Eliteschule des Sports?},
  year      = {2003},
  language  = {de}
}
@article{ElbeBeckmannSzymanski2003,
  author    = {Elbe, Anne-Marie and Beckmann, J{\"u}rgen and Szymanski, Birgit},
  title     = {Die Entwicklung des allgemeinen und sportspezifischen Leistungsmotivs von Sportinternatssch{\"u}ler/innen},
  issn      = {0945-6031},
  year      = {2003},
  language  = {de}
}
@article{ElbeBeckmannSzymanski2003,
  author    = {Elbe, Anne-Marie and Beckmann, J{\"u}rgen and Szymanski, Birgit},
  title     = {The Dropout Phenomenon at elite sport schools : a problem of self-regulation},
  isbn      = {84- 9772-095-4},
  year      = {2003},
  language  = {en}
}
@article{KellmannBeckmann2003,
  author    = {Kellmann, Michael and Beckmann, J{\"u}rgen},
  title     = {Sport und Entspannungsverfahren},
  year      = {2003},
  language  = {de}
}
@article{KellmannBeckmann2003,
  author    = {Kellmann, Michael and Beckmann, J{\"u}rgen},
  title     = {Research and intervention in sport psychology : new perspectives for an inherent conflict},
  year      = {2003},
  language  = {en}
}