@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{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}
}
@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{PawelkeSchmittMeissen1990,
  author    = {Pawelke, Siegfried and Schmitt, W. and Meissen, Th.},
  title     = {Aachen 3D finger. 3D digitizer for application in dentistry / Schmitt, W. ; Pawelke, S. ; Meissen, Th.},
  series = {Biomedizinische Technik. 35 (1990), H. 4},
  journal   = {Biomedizinische Technik. 35 (1990), H. 4},
  isbn      = {0013-5585},
  pages     = {69 -- 71},
  year      = {1990},
  language  = {en}
}
@article{Mischke1990,
  author    = {Mischke, Winfried},
  title     = {Unzust{\"a}ndigkeit der Berufungskammer bei Klageerweiterung},
  series = {Neue juristische Wochenschrift / NJW-Rechtsprechungs-Report Zivilrecht. 5 (1990), H. 11},
  journal   = {Neue juristische Wochenschrift / NJW-Rechtsprechungs-Report Zivilrecht. 5 (1990), H. 11},
  isbn      = {0179-4043},
  pages     = {704},
  year      = {1990},
  language  = {de}
}
@article{MerschenzQuackMootz1990,
  author    = {Merschenz-Quack, Angelika and Mootz, D.},
  title     = {Structure of 5-sulfosalicylic acid pentahydrate},
  series = {Acta crystallographica / Section C, Crystal structure communications. C 46 (1990), H. 8},
  journal   = {Acta crystallographica / Section C, Crystal structure communications. C 46 (1990), H. 8},
  isbn      = {0108-2701},
  pages     = {1478 -- 1480},
  year      = {1990},
  language  = {en}
}
@article{Meliss1990,
  author    = {Meliß, Michael},
  title     = {Regenerative Energiequellen},
  series = {Brennstoff, W{\"a}rme, Kraft : BWK ; das Energie-Fachmagazin. Bd. 42 (1990), H. 4},
  journal   = {Brennstoff, W{\"a}rme, Kraft : BWK ; das Energie-Fachmagazin. Bd. 42 (1990), H. 4},
  issn      = {0006-9612 (Print) ; 1436-4883 (E-Journal)},
  pages     = {173 -- 179},
  year      = {1990},
  language  = {de}
}
@article{Mayer1990,
  author    = {Mayer, Claudia},
  title     = {Das Ich ist eine Illusion},
  series = {Deutsches Allgemeines Sonntagsblatt (1990)},
  journal   = {Deutsches Allgemeines Sonntagsblatt (1990)},
  pages     = {16 -- 16},
  year      = {1990},
  language  = {de}
}
@article{Mayer1990,
  author    = {Mayer, Claudia},
  title     = {Bali. Bl{\"u}teninsel im Indischen Ozean. Reisebericht},
  series = {Fliegende Bl{\"a}tter / Condor (1990)},
  journal   = {Fliegende Bl{\"a}tter / Condor (1990)},
  pages     = {61 -- 64},
  year      = {1990},
  language  = {de}
}