Müller, Wolfgang. “Contract-Oriented System Design and Specification.” Proceedings of the Workshop on Practical Computer Based Systems Engineering - Its Scope and Methods, 1991.

Lehrenfeld, Georg, and Wolfgang Müller. “Validation of EXPRESS Models Using Prolog.” Proceedings of the 1st EXPRESS User’s Group Conference, 1991.

Alt, Helmut, et al. “Approximation of Convex Polygons.”10.1007/bfb0032068__Automata, Languages and Programming, Springer-Verlag, 1990, pp. 703–16, doi:10.1007/bfb0032068.

Hohenstein, Uwe, and Gregor Engels. “Formal Semantics of an Entity-Relationship Query Language.” Proceedings of the 9th International Conference on Entity-Relationship Approach (ER 90), Lausanne, Switzerland, ER Institute, 1990, pp. 177–88.

Engels, Gregor. “Elementary Actions on an Extended Entity-Relationship Database.”http://dx.doi.org/10.1007/BFb0017372__Proceedings of the Workshop on Graph Grammars and Their Application to Computer Science (1990), Bremen (Germany), vol. 532, Springer, 1990, pp. 344–62, doi:http://dx.doi.org/10.1007/BFb0017372.

Dietzfelbinger, Martin, and Friedhelm Meyer auf der Heide. “A New Universal Class of Hash Functions and Dynamic Hashing in Real Time.”10.1007/bfb0032018__Automata, Languages and Programming, 1990, doi:10.1007/bfb0032018.

Meyer auf der Heide, Friedhelm. “Dynamic Hashing Strategies.”10.1007/bfb0029597__Lecture Notes in Computer Science, 1990, doi:10.1007/bfb0029597.

Karpinski, Marek, and Friedhelm Meyer auf der Heide. “On the Complexity of Genuinely Polynomial Computation.”10.1007/bfb0029630__Lecture Notes in Computer Science, 1990, doi:10.1007/bfb0029630.

Dietzfelbinger, M., and Friedhelm Meyer auf der Heide. “How to Distribute a Dictionary in a Complete Network.”10.1145/100216.100229__Proceedings of the Twenty-Second Annual ACM Symposium on Theory of Computing  - STOC ’90, 1990, doi:10.1145/100216.100229.

Gil, J., et al. “Not All Keys Can Be Hashed in Constant Time.”10.1145/100216.100247__Proceedings of the Twenty-Second Annual ACM Symposium on Theory of Computing  - STOC ’90, 1990, doi:10.1145/100216.100247.

Meyer auf der Heide, Friedhelm. “Das Heinz Nixdorf-Institut Der Universität-GH Paderborn.” Informatik Spektrum, vol. 13, no. 4, 1990, pp. 231–32.

Domik, Gitta, et al. “IRAS On-Line Catalogs at CASA.” Proceedings of the 176th Meeting of the American Astronomical Society, vol. Vol. 22, no. No. 2, 1990.

Domik, Gitta, et al. “Applications of IRAS Preprocessing at the Workstation.” Bulletin of the American Astronomical Society, vol. 22, 1990, p. 828.

Domik, Gitta, et al. “Workstation-Based Preprocessing of IRAS Sky-Flux Images.” Publications of the Astronomical Society of the Pacific, vol. 102, no. 656, IOP Publishing, 1990, p. 1167.

Mickus, KD, et al. “A Case Study: Multi-Sensor Data Analysis of Hh Objects via Star: A Scientific Toolkit for Astrophysical Research.” Bulletin of the American Astronomical Society, vol. 22, 1990, p. 1259.

Mickus, KD, et al. “Star-a Scientific Toolkit for Astrophysical Research.” Bulletin of the American Astronomical Society, vol. 22, 1990, p. 828.

Kleine Büning, Hans, et al. “Projections of Vector Addition System Reachability Sets Are Semilinear.”10.1016/0304-3975(89)90055-8__Theoretical Computer Science, 1989, pp. 343–50, doi:10.1016/0304-3975(89)90055-8.

Ebert, Jürgen, and Gregor Engels. “Konzepte Einer Software-Architektur-Beschreibungssprache.” Software-Entwicklung: Konzepte, Erfahrungen, Perspektiven, Fachtagung, 1989, Marburg (Germany), vol. 212, Springer, 1989, pp. 238–50.

Engels, Gregor. “CADDY-O: Syntaxgestütztes, Graphisches Entwerfen Konzeptioneller Datenbankschemata.” Tagungsband GI-Fachtagung “Interaktive Schnittstellen Für Informationssysteme”, TU Clausthal, Notizen Zu Interaktive Systeme, vol. 18, 1989, pp. 1–16.

Engels, Gregor, et al. “CADDY: Computer-Aided Design of Non-Standard Databases.” Proceedings of the International Conference on System Development Environments &; Factories, Berlin, Germany, Pitman Publishing, 1989.

Engels, Gregor. Benutzerschnittstelle Und Architektur Der Integrierten Datenbankentwurfsumgebung CADDY (Kurzfassung). TU Braunschweig, 1989.

Engels, Gregor, and Wilhelm Schäfer. Programmentwicklungsumgebungen: Konzepte Und Realisierung. Teubner, 1989.

Just, Bettina, et al. “On Computations with Integer Division.”10.1051/ita/1989230101011__RAIRO - Theoretical Informatics and Applications, 1989, pp. 101–11, doi:10.1051/ita/1989230101011.

Dietzfelbinger, M., and Friedhelm Meyer auf der Heide. “An Optimal Parallel Dictionary.”10.1145/72935.72974__Proceedings of the First Annual ACM Symposium on Parallel Algorithms and Architectures  - SPAA ’89, 1989, doi:10.1145/72935.72974.

Meyer auf der Heide, Friedhelm. “On Genuinely Time Bounded Computations.”10.1007/bfb0028969__STACS 89, 1989, doi:10.1007/bfb0028969.

Meyer auf der Heide, Friedhelm, and Rolf Wanka. “Time-Optimal Simulations of Networks by Universal Parallel Computers.”10.1007/bfb0028978__STACS 89, 1989, doi:10.1007/bfb0028978.

Meyer auf der Heide, Friedhelm. “Computing Minimum Spanning Forests on 1- and 2-Dimensional Processor Arrays.”10.1007/bfb0028983__STACS 89, 1989, doi:10.1007/bfb0028983.

Rammig, Franz Josef, and Wolfgang Müller. “ODICE: Object-Oriented Hardware Description in CAD Environment.” Proc. of the Ninth IFIP Symposium on CHDLs and Their Application, 1989.

Kleine Büning, Hans, and Theodor Lettmann. “Perspektiven Für Die Logikprogrammierung.” Workshop Wissensrepräsentation in Expertensystemen, edited by G. Rahmstorf, 1988, pp. 56–78.

Engels, Gregor, et al. “A Highly Integrated Tool Set for Program Development Support.”http://dx.doi.org/10.1145/62453.62454__Proceedings of the Conference on ACM SIGSMALL/PC Symposium on ACTES (SIGSMALL 1988), Cannes (France), ACM Press, 1988, pp. 1–10, doi:http://dx.doi.org/10.1145/62453.62454.

Engels, Gregor, et al. “Konzeption Einer Integrierten Datenbank-Entwurfsumgebung.” Proceedings of DBTA/SI Data Dictionaries Und Entwicklungswerkzeuge Für Datenbank-Anwendungen, Zürich, Switzerland, Verlag der Fachvereine an den Schweiz. Hochschulen und Techniken, 1988, pp. 151–57.

Engels, Gregor, et al. “Auf Dem Weg Zu Einer Integrierten Datenbank-Entwurfsumgebung.” Proceedings of the GI-Workshop on “Sprachspezifische Programmierumgebungen,” edited by Gregor Engels et al., G. Snelting, 1988, pp. 38–51.

Ebert, Jürgen, and Gregor Engels. Ein Konzept Zur Beschreibung von Software-Architekturen. EWH Koblenz, 1988.

Engels, Gregor, et al. “Die Benutzerschnittstelle Einer Integrierten Modula-2 Programmentwicklungsumgebung.” Proceedings of GI-Workshop Sprachspezifische Programmierumgebungen, Darmstadt, Germany, 1988.

Babai, László, et al. “On the Limits of Computations with the Floor Function.”10.1016/0890-5401(88)90031-4__Information and Computation, 1988, pp. 99–107, doi:10.1016/0890-5401(88)90031-4.

Meyer auf der Heide, Friedhelm. “Fast Algorithms for N-Dimensional Restrictions of Hard Problems.”10.1145/44483.44490__Journal of the ACM (JACM), 1988, pp. 740–47, doi:10.1145/44483.44490.

Borodin, Allan, et al. “A Tradeoff between Search and Update Time for the Implicit Dictionary Problem.”10.1016/0304-3975(88)90018-7__Theoretical Computer Science, 1988, pp. 57–68, doi:10.1016/0304-3975(88)90018-7.

Dietzfelbinger, M., et al. “Dynamic Perfect Hashing: Upper and Lower Bounds.”10.1109/sfcs.1988.21968__[Proceedings 1988] 29th Annual Symposium on Foundations of Computer Science, 1988, doi:10.1109/sfcs.1988.21968.

Just, Bettina, et al. “On Computations with Integer Division.”10.1007/bfb0035829__STACS 88, 1988, doi:10.1007/bfb0035829.

Dietzfelbinger, M., et al. “Upper and Lower Bounds for the Dictionary Problem.”10.1007/3-540-19487-8_24__SWAT 88, 1988, doi:10.1007/3-540-19487-8_24.

Domik, Gitta. “Enhancement Techniques in Digital Image Processing.” Proceedings of the Computer Science Symposium, 1988, pp. 211–17.

Brugel, Edward W., et al. “A Multi-Spectral Analysis System Using Large Databases.” European Southern Observatory Conference and Workshop Proceedings, vol. 28, 1988, pp. 3–8.

Domik, Gitta, et al. “Dependence of Image Grey Values on Topography in SIR-B Images.” International Journal of Remote Sensing, vol. 9, no. 5, Taylor \'26; Francis, 1988, pp. 1013–22.

Leberl, Franz, et al. “SIR-B Stereo-Radargrammetry of Australia.” International Journal of Remote Sensing, vol. 9, no. 5, Taylor \'26; Francis, 1988, pp. 997–1011.

Büning, Hans Kleine, and Theodor Lettmann. “Representation Independent Query and Update Operations on Propositional Definite Horn Formulas.”10.1007/3-540-18170-9_167__Computation Theory and Logic, edited by Egon Börger, 1987, pp. 208–23, doi:10.1007/3-540-18170-9_167.

Domik, Gitta, and Franz Leberl. “Image Based SAR Product Simulation for Analysis.” ASPRS-ACSM, 1987.

Engels, Gregor, and Andy Schürr. “A Hybrid Interpreter in a Software Development Environment.” Proceedings of the 1st European Software Engineering Conference (ESEC ’87), Strasbourg (France), vol. 289, Springer, 1987, pp. 80–88.

Engels, Gregor, et al. “On the Structure of Structure-Oriented Editors for Different Applications.” Proceedings of the ACM SIGSOFT/SIGPLAN Software Engineering Symposium on Practical Software Development Environments, Palo Alto, USA, vol. 22, no. 1, ACM SIGPLAN Notices, 1987, pp. 190–98.

Engels, Gregor, et al. “Graph Grammar Engineering: A Software Specification Method.”dx.doi.org/10.1007/3-540-18771-5__Proceedings of the 3rd International Workshop on Graph-Grammars and Their Application to Computer Science, Warrenton, VA (USA), vol. 291, Springer, 1987, pp. 186–201, doi:dx.doi.org/10.1007/3-540-18771-5.

Borodin, A., et al. “A Time-Space Tradeoff for Element Distinctness.”10.1137/0216007__SIAM Journal on Computing, 1987, pp. 97–99, doi:10.1137/0216007.