@incollection{Pietsch1990,
  author    = {Pietsch, Wolfram},
  title     = {Flexibilisierung des betrieblichen Software-Projektmanagements},
  series = {Beitr{\"a}ge zum Projektmanagement-Forum 90 : vom 19. - 21. September 1990 in Aachen},
  booktitle = {Beitr{\"a}ge zum Projektmanagement-Forum 90 : vom 19. - 21. September 1990 in Aachen},
  publisher = {Gesellschaft f{\"u}r Projektmanagement INTERNET Deutschland e.V.},
  address   = {M{\"u}nchen},
  organization    = {Projektmanagement-Forum <1990, Aachen>},
  isbn      = {3-924841-10-1},
  pages     = {345 -- 355},
  year      = {1990},
  language  = {de}
}
@article{PietschSiedentopf1990,
  author    = {Pietsch, Wolfram and Siedentopf, J.},
  title     = {Wissensbasierte Programmierung in konventionellen Programmiersprachen - Entwicklung einer flexiblen Schnittstelle zur Expertensystementwicklung in Ada / Pietsch, W., Siedentopf, J.},
  series = {Wissensbasierte Systeme in der Betriebswirtschaft : Grundlagen, Entwicklung, Anwendungen / Hrsg. Dieter Ehrenberg ...},
  journal   = {Wissensbasierte Systeme in der Betriebswirtschaft : Grundlagen, Entwicklung, Anwendungen / Hrsg. Dieter Ehrenberg ...},
  publisher = {Schmidt},
  address   = {Berlin},
  isbn      = {3-503-03144-8},
  pages     = {233 -- 250},
  year      = {1990},
  language  = {de}
}
@article{Pietsch1990,
  author    = {Pietsch, Wolfram},
  title     = {Flexible Planung und Kontrolle von Prototyping-Projekten},
  series = {Operations research proceedings 1989 : papers of the 18. annual meeting / DGOR. Hrsg. von K.-P. Kistner ....},
  journal   = {Operations research proceedings 1989 : papers of the 18. annual meeting / DGOR. Hrsg. von K.-P. Kistner ....},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {3540524894},
  pages     = {382 -- 387},
  year      = {1990},
  language  = {de}
}
@article{PietschKurbel1990,
  author    = {Pietsch, Wolfram and Kurbel, Karl},
  title     = {A Cooperative Work Environment for Evolutionary Software Development / Kurbel, K., Pietsch, W.},
  series = {Multi-user interfaces and applications : proceedings of the IFIP WG 8.4 Conference on Multi-User Interfaces and Applications, Heraklion, Crete, Greece, 24 - 26 September, 1990 / ed. by Simon Gibbs ...},
  journal   = {Multi-user interfaces and applications : proceedings of the IFIP WG 8.4 Conference on Multi-User Interfaces and Applications, Heraklion, Crete, Greece, 24 - 26 September, 1990 / ed. by Simon Gibbs ...},
  publisher = {North-Holland Publ.},
  address   = {Amsterdam [u.a.]},
  isbn      = {0-444-88760-1},
  pages     = {115 -- 127},
  year      = {1990},
  language  = {en}
}
@article{PietschBolteKurbeletal.1990,
  author    = {Pietsch, Wolfram and Bolte, Christine and Kurbel, Karl and Moazzami, Mahmoud},
  title     = {Ein Schnappschuss der Expertensystemszene in der Bundesrepublik Deutschland / Bolte, Christine; Kurbel, Karl; Moazzami, Mahmoud; Pietsch, Wolfram},
  series = {Wirtschaftsinformatik. 32 (1990), H. 1},
  journal   = {Wirtschaftsinformatik. 32 (1990), H. 1},
  isbn      = {0937-6429},
  pages     = {79 -- 86},
  year      = {1990},
  language  = {de}
}