@inproceedingsAlt_Behrends_Blömer_1991, title=Approximate matching of polygonal shapes (extended abstract), DOI=10.1145/109648.109669, booktitle=Proceedings of the seventh annual symposium on Computational geometry  - SCG ’91, publisher=ACM Press, author=Alt, Helmut and Behrends, Bernd and Blömer, Johannes, year=1991 
LibreCat: /record/3048
DOI: 10.1145/109648.109669

@inproceedingsBlömer_1991, title=Computing sums of radicals in polynomial time, DOI=10.1109/sfcs.1991.185434, booktitle=Proceedings 32nd Annual Symposium of Foundations of Computer Science, publisher=IEEE Comput. Soc. Press, author=Blömer, Johannes, year=1991 
LibreCat: /record/3049
DOI: 10.1109/sfcs.1991.185434

@bookPeckhaus_1991, title=Modern Logic 1 (1990/91), H. 2/3 (Winter 1990/91), Special issue commemorating the centenary of the publication of the first volume of Ernst Schröder’s Vorlesungen über die Algebra der Logik, volume=H. 2/3, year=1991 
LibreCat: /record/17451

@articlePeckhaus_1991, title=Introduction, volume=1, number=2/3, journal=Modern Logic, author=Peckhaus, Volker, year=1991, pages=113–116 
LibreCat: /record/17472

@articleEke_1991, title=Die deutschsprachige Literatur Osteuropas und ihre Rezeption in der Bundesrepublik. Probleme und Chancen einer “kleinen Literatur”, volume=29, number=H. 113, journal=Deutsche Studien 29, author=Eke, Norbert Otto, year=1991, pages=30–50 
LibreCat: /record/19438

@inproceedingsDomik_1991, place=Berlin, Heidelberg, title=The role of visualization in understanding data, booktitle=New Results and New Trends in Computer Science, publisher=Springer Berlin Heidelberg, author=Domik, Gitta, editor=Maurer, HermannEditor, year=1991, pages=91–107 
LibreCat: /record/21790

@inproceedingsKrauter_Hanitsch_Strauss_1991, title=Simulation-Program for Selecting Efficiency Improving Strategies of PV-Module-Encapsulations under Operating Conditions, booktitle=Proceedings of “Renewable Energy Sources ”, Prag (CFSR), 1.–4. Juli 1991, Band 3, S. 48–53., author=Krauter, Stefan and Hanitsch, Rolf and Strauss, Philipp, year=1991 
LibreCat: /record/8082

@bookLöhr-Richter_Engels_1991, place=Leiden University, P.O. Box 9500, 2300 RA Leiden, The Netherlands, title=Incremental Design of Conceptual Database Schemata with CADDY, publisher=Leiden University, author=Löhr-Richter, Perdita and Engels, Gregor, year=1991 
LibreCat: /record/8188

@inbookStelter_Sextro_1991, series=International Series of Numerical Mathematics / Internationale Schriftenreihe zur Numerischen Mathematik / S\rquote erie Internationale d’Analyse Num\rquote erique, title=Bifurcations in Dynamic Systems with Dry Friction, volume=97, DOI=10.1007/978-3-0348-7004-7_44, booktitle=Bifurcation and Chaos: Analysis, Algorithms, Applications, publisher=Birkhäuser Basel, author=Stelter, Peter and Sextro, Walter, editor=Seydel, R. and Schneider, F.W. and Küpper, T. and Troger, H.Editors, year=1991, pages=343–347, collection=International Series of Numerical Mathematics / Internationale Schriftenreihe zur Numerischen Mathematik / S\rquote erie Internationale d’Analyse Num\rquote erique 
LibreCat: /record/8894
DOI: 10.1007/978-3-0348-7004-7_44

@inproceedingsDomik_Mickus_1991, title=Visualization in the Analysis Cycle of Observational Data, in Analyzing and Modeling Data and Knowledge, booktitle=Proceedings of the 15th Annual Conference of the “Gesellschaft für Klassifikation e.V.” University of Salzburg, author=Domik, Gitta and Mickus, KD , editor=Schader, M.Editor, year=1991, pages=267–276 
LibreCat: /record/16912

@articlePeckhaus_1991, title=Ernst Schröder und die ,pasigraphischen Systeme‘ von Peano und Peirce, volume=1, number=2/3, journal=Modern Logic, author=Peckhaus, Volker, year=1991, pages=174–205 
LibreCat: /record/17473

@inproceedingsPeckhaus_1991, place=o.O.u.J. (Uppsala), title=Logic in Transition: The Logical Calculi of Hilbert (1905) and Zermelo (1908) [Abstract], booktitle=Abstracts of the 9th International Congress of Logic, Methodology and Philosophy of Science, Uppsala, August 7–14, 1991, Bd. 2: General Philosophy of Science. Sections 6–9, author=Peckhaus, Volker, year=1991, pages=158 
LibreCat: /record/17822

@inproceedingsMüller_1991, place=Grassau Germany, title=Contract-Oriented System Design and Specification, booktitle=Proceedings of the Workshop on Practical Computer Based Systems Engineering - its Scope and Methods, author=Müller, Wolfgang, year=1991 
LibreCat: /record/39584

@inproceedingsLehrenfeld_Müller_1991, place=Houston TX, USA, title=Validation of EXPRESS Models Using Prolog, booktitle=Proceedings of the 1st EXPRESS User’s Group Conference, author=Lehrenfeld, Georg and Müller, Wolfgang, year=1991 
LibreCat: /record/39583

@inbookSchroeter-Wittke_1991, place=Gütersloh, title=Letzter Sonntag nach Epiphanias; Predigttext: 2. Korinther 4,6-10, volume=132–139, booktitle=Gottesdienstpraxis. Serie A. II. Perikopenreihe Band 1, publisher=Gütersloher Verlagshaus, author=Schroeter-Wittke, Harald, editor=Nitschke, Horst, year=1991 
LibreCat: /record/43478

@inproceedingsGoser_Hilleringmann_Rückert_1991, place=Berlin, Heidelberg, title=Application and implementation of neural networks in microelectronics, booktitle=Artificial Neural Networks, publisher=Springer Berlin Heidelberg, author=Goser, K. and Hilleringmann, Ulrich and Rückert, U., editor=Prieto, Alberto, year=1991, pages=243–259 
LibreCat: /record/39922

@inbookEke_1990, place=Gütersloh, München, title=Maximilian von Löwenthal, volume=7, booktitle=Literatur Lexikon. Autoren und Werke deutscher Sprache. Bd. 7, author=Eke, Norbert Otto, editor=Killy, WaltherEditor, year=1990, pages=332 
LibreCat: /record/19490

@inbookAlt_Blömer_Wagener_1990, place=Berlin/Heidelberg, title=Approximation of convex polygons, DOI=10.1007/bfb0032068, booktitle=Automata, Languages and Programming, publisher=Springer-Verlag, author=Alt, Helmut and Blömer, Johannes and Wagener, Hubert, year=1990, pages=703–716 
LibreCat: /record/3050
DOI: 10.1007/bfb0032068

@bookPeckhaus_1990, place=Göttingen, series=Studien zur Wissenschafts-, Sozial- und Bildungsgeschichte der Mathematik, title=Hilbertprogramm und Kritische Philosophie. Das Göttinger Modell interdisziplinärer Zusammenarbeit zwischen Mathematik und Philosophie, volume=7, publisher=Vandenhoeck &; Ruprecht, author=Peckhaus, Volker, year=1990, collection=Studien zur Wissenschafts-, Sozial- und Bildungsgeschichte der Mathematik 
LibreCat: /record/17445

@bookEke_Oellers_Skrodzki_Steinecke_1990, place=Wien, title=Nikolaus Lenau. Werke und Briefe. Historisch-kritische Gesamtausgabe. Bd. 6,1: Briefe 1838-1847. Teil 1: Text (Edition), publisher=Österreichischer Bundesverlag, Klett-Cotta, author=Eke, Norbert Otto and Oellers, Norbert and Skrodzki, Karl Jürgen and Steinecke, Hartmut, year=1990 
LibreCat: /record/19151