@misc{Balderjahn1999,
  author    = {Balderjahn, Ingo},
  title     = {Sabel, H., Weiser, C., Dynamik im Marketing, Umfeld - Strategie - Struktur - Kultur; Wiesbaden, Gabler, 1998},
  year      = {1999},
  language  = {de}
}
@misc{Hummel1999,
  author    = {Hummel, Detlev},
  title     = {M{\"a}rkte, Pl{\"a}tze, Finanzsysteme: L{\"a}nderbericht USA},
  year      = {1999},
  language  = {de}
}
@misc{HummelSteden1999,
  author    = {Hummel, Detlev and Steden, Philip},
  title     = {M{\"a}rkte, Pl{\"a}tze, Finanzsysteme: L{\"a}nderbericht Großbritannien},
  year      = {1999},
  language  = {de}
}
@misc{Richter1999,
  author    = {Richter, Martin},
  title     = {Interne Revision},
  year      = {1999},
  language  = {de}
}
@misc{Richter1999,
  author    = {Richter, Martin},
  title     = {Jahresabschlußpr{\"u}fung},
  year      = {1999},
  language  = {de}
}
@misc{Richter1999,
  author    = {Richter, Martin},
  title     = {Pr{\"u}fungswesen},
  year      = {1999},
  language  = {de}
}
@misc{Jungmittag1999,
  author    = {Jungmittag, Andre},
  title     = {Senker, J., Biotechnology and competetive advantage : Europe's firms and the US challenge; Cheltenham, Elgar, 1998},
  year      = {1999},
  language  = {en}
}