@incollection{Doeren1987,
  author    = {D{\"o}ren, Horst-Peter},
  title     = {Nichtrostende St{\"a}hle},
  series = {Jahrbuch Schweißtechnik. 1988},
  booktitle = {Jahrbuch Schweißtechnik. 1988},
  publisher = {Dt. Verl. f{\"u}r Schweißtechnik (DVS)},
  address   = {D{\"u}sseldorf},
  isbn      = {0935-0292},
  pages     = {188 -- 203},
  year      = {1987},
  language  = {de}
}
@incollection{MertensBecker1989,
  author    = {Mertens, Josef and Becker, K.},
  title     = {Numerical solution of flow equations : an aircraft designer's view},
  series = {Nonlinear hyperbolic equations - theory, computation methods, and applications : proceedings of the 2nd International Conference on Nonlinear Hyperbolic Problems, Aachen, FRG, March 14 to 18, 1988. - (Notes on Numerical Fluid Mechanics ; 24)},
  booktitle = {Nonlinear hyperbolic equations - theory, computation methods, and applications : proceedings of the 2nd International Conference on Nonlinear Hyperbolic Problems, Aachen, FRG, March 14 to 18, 1988. - (Notes on Numerical Fluid Mechanics ; 24)},
  editor    = {Ballmann, Josef},
  publisher = {Vieweg},
  address   = {Braunschweig},
  isbn      = {3-528-08098-1},
  doi       = {10.1007/978-3-322-87869-4_41},
  pages     = {403 -- 412},
  year      = {1989},
  abstract  = {Today the most accurate and cost effective industrial codes used in aircraft design are based on the full potential equation coupled with boundary layer equations. However, these are not capable to solve complicated three-dimensional problems of vortical flows and shocks. On the other hand Euler and Navier-Stokes codes are too expensive and not accurate enough for design purposes, especially in regard of drag and interference prediction. The reasons for these deficiencies are investigated and a way to overcome them by future developments is demonstrated.},
  language  = {en}
}
@incollection{KurbelPietsch1989,
  author    = {Kurbel, Karl and Pietsch, Wolfram},
  title     = {Projektmanagementebenen bei evolution{\"a}rer Softwareentwicklung},
  series = {Interaktive betriebswirtschaftliche Informations- und Steuerungssysteme},
  booktitle = {Interaktive betriebswirtschaftliche Informations- und Steuerungssysteme},
  editor    = {Kurbel, Karl and Mertens, Peter and Scheer, August W.},
  publisher = {De Gruyter},
  address   = {Berlin},
  isbn      = {3-11-012100-X},
  doi       = {10.1515/9783110847055-013},
  pages     = {261 -- 285},
  year      = {1989},
  language  = {de}
}
@incollection{Doeren1990,
  author    = {D{\"o}ren, Horst-Peter},
  title     = {Das Schweißen von Austenit-Ferrit-Verbindungen},
  series = {Jahrbuch Schweißtechnik. 1991},
  booktitle = {Jahrbuch Schweißtechnik. 1991},
  publisher = {DVS-Verlag},
  address   = {D{\"u}sseldorf},
  isbn      = {3-87155-725-0},
  pages     = {57 -- 63},
  year      = {1990},
  language  = {de}
}
@incollection{Meliss1990,
  author    = {Meliß, Michael},
  title     = {Trends und Schwerpunkte bei der Entwicklung regenerativer Energietr{\"a}ger},
  series = {Technische Perspektiven und gesellschaftliche Entwicklungen : Trends und Schwerpunkte der Forschung in der Bundesrepublik Deutschland / Ulrich Widmaier; Thomas K{\"o}nig (Hrsg.). - (Studien zur gesellschaftlichen Entwicklung ; 1)},
  booktitle = {Technische Perspektiven und gesellschaftliche Entwicklungen : Trends und Schwerpunkte der Forschung in der Bundesrepublik Deutschland / Ulrich Widmaier; Thomas K{\"o}nig (Hrsg.). - (Studien zur gesellschaftlichen Entwicklung ; 1)},
  publisher = {Nomos-Verl.-Ges.},
  address   = {Baden-Baden},
  isbn      = {3-7890-1891-0},
  pages     = {279 -- 306},
  year      = {1990},
  language  = {de}
}
@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}
}
@incollection{KollerStellberg1991,
  author    = {Koller, R. and Stellberg, Michael},
  title     = {Schnappverbindungen},
  series = {Handbuch der Verbindungstechnik / hrsg. von Carl-Otto Bauer},
  booktitle = {Handbuch der Verbindungstechnik / hrsg. von Carl-Otto Bauer},
  publisher = {Hanser},
  address   = {M{\"u}nchen},
  isbn      = {3-446-14609-1},
  pages     = {294 -- 324},
  year      = {1991},
  language  = {de}
}
@incollection{OezdilBerndtHoecker1991,
  author    = {{\"O}zdil, S. and Berndt, Heinz and H{\"o}cker, Hartwig},
  title     = {Systematische Erfassung der Best{\"a}ndigkeit von Ryton-, P84- und Dralon ATF 1063-Fasern unter Einwirkung verschiedener NOx-Konzentrationen in einem definierten Temperaturintervall},
  series = {Schriftenreihe des Deutschen Wollforschungsinstitutes an der Technischen Hochschule Aachen e.V.},
  booktitle = {Schriftenreihe des Deutschen Wollforschungsinstitutes an der Technischen Hochschule Aachen e.V.},
  number    = {107},
  publisher = {Dt. Wollforschungsinstitut},
  address   = {Aachen},
  issn      = {0930-3723},
  pages     = {89 -- 129},
  year      = {1991},
  language  = {de}
}
@incollection{GidomPietsch1991,
  author    = {Gidom, D. and Pietsch, Wolfram},
  title     = {Integrierte Steuerung von Bauprojekten durch Expertensysteme},
  series = {Dortmunder Expertensystemtage '91 : in Verbindung mit dem 3. Anwenderforum des KI-Verbundes NRW},
  booktitle = {Dortmunder Expertensystemtage '91 : in Verbindung mit dem 3. Anwenderforum des KI-Verbundes NRW},
  publisher = {T{\"U}V Rheinland},
  address   = {K{\"o}ln},
  isbn      = {3-88585-998-X},
  pages     = {356 -- 365},
  year      = {1991},
  language  = {de}
}
@incollection{FrewerMeliss1992,
  author    = {Frewer, Hans and Meliß, Michael},
  title     = {Stromerzeugung - Perspektiven der Kraftwerkstechnik},
  series = {Die Zukunft der Stromversorgung / Alfred Voß (Hrsg.)},
  booktitle = {Die Zukunft der Stromversorgung / Alfred Voß (Hrsg.)},
  publisher = {Verlags- und Wirtschaftsgesellschaft der Elektrizit{\"a}tswerke},
  address   = {Frankfurt a. M.},
  isbn      = {3-8022-0299-6},
  pages     = {49 -- 117},
  year      = {1992},
  language  = {de}
}