@book{Hummeltenberg.1998,
  address = {Braunschweig},
  author = {Hummeltenberg, Wilhelm},
  institution = {Fr\"uhjahrstagung Wirtschaftsinformatik},
  interhash = {254f60afd14ae845cc239ee0e72ece31},
  intrahash = {4a27fbe3e43b4d3e41645878c5946bdc},
  isbn = {3528056789},
  publisher = {Vieweg},
  title = {Information management for business and competitive intelligence and excellence:  Proceedings der Fr\"uhjahrstagung Wirtschaftsinformatik '98},
  year = 1998
}

@book{Alpar.1998,
  address = {Braunschweig},
  author = {Alpar, Paul},
  interhash = {fab3b748a0a42ce5a3abab79d41e49fe},
  intrahash = {dbe3a246b1481d18211e88ce18fa039d},
  isbn = {3528056568},
  price = {ca. DM 49.80},
  publisher = {Vieweg},
  title = {Unternehmensorientierte Wirtschaftsinformatik:  Eine Einführung in die Strategie und Realisierung erfolgreicher IuK-Systeme},
  year = 1998
}

@book{Biethahn.2004b,
  address = {München},
  author = {Biethahn, Jörg and Mucksch, Harry and Ruf, Walter},
  edition = {6., vollst. überarb. und neu gefasste Aufl.},
  interhash = {1be137d979937c2026f72862dad0ed9e},
  intrahash = {27f1f4bdbbd7fed409edf2e3a399d3c5},
  isbn = {3486200208},
  publisher = {Oldenbourg},
  series = {Ganzheitliches Informationsmanagement / von Jörg Biethahn Harry Mucksch und Walter Ruf},
  title = {Grundlagen},
  volume = {Bd. 1},
  year = 2004
}

@book{Szyperski.2001,
  address = {Lohmar},
  author = {Szyperski, Norbert},
  edition = {2. Aufl.},
  interhash = {25374f582c718c5af624d83de37b2822},
  intrahash = {c4c733d4af536620a6ee73468142567c},
  isbn = {3890128874},
  price = {DM 19.00, EUR 9.00 (ab 1.1.2002)},
  publisher = {Eul},
  title = {Unternehmungs-Informatik:  Grundlegende \"Uberlegungen zu einer Informationstechnologie f\"ur Unternehmungen},
  year = 2001
}