Schroeter-Wittke, Harald. “Lieder-Liches Zum Gemeindeaufbau. Hymnologische Bausteine.” Deutsches Pfarrerblatt 91 (1991): 239–41.
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Goser, K., Ulrich Hilleringmann, and U. Rückert. “Application and Implementation of Neural Networks in Microelectronics.” In Artificial Neural Networks, edited by Alberto Prieto, 243–259. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991.
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Herzig, Bardo. “Definite Clause Grammars (DCG´s) zur Sprachanalyse. Eine Einführung in GRAMCOM, eine Benutzeroberfläche zur Analyse formaler und natürlicher Sprachen mit Hilfe von DCG´s.” In Neue Fragen der Linguistik. Bd. 2: Innovation und Anwendung, edited by E. Feldbusch, R. Pogarell, and C. Weiß, 467–72. Tübingen: Max Niemeyer Verlag, 1991.
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Hilgert, Joachim. “Varadarajan, V.S. An Introduction to Harmonic Analysis on Semisimple Lie Groups (Cambridge University Press, 1989).” JBer. DMV, 1991.
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Hilgert, Joachim. “Terras, A. Harmonic Analysis on Symmetric Spaces I and II (Springer, New York, 1985 Und 1988).” JBer. DMV, 1991.
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Hilgert, Joachim, G. Ólafsson, and B. Orsted. “Hardy Spaces on Affine Symmetric Spaces.” J. Reine Und Angew. Math. 415 (1991): 189–218.
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Hilgert, Joachim. “Group Theoretical Aspects of Gödels Model.” In Jahrbuch Der Gödel Gesellschaft, edited by Joachim Hilgert. Wien, 1991.
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Hilgert, Joachim. “Infinitesimally Generated Subsemigroups of Motion Groups.” Rocky Mount. J. Math. 21 (1991): 865–78.
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Hilgert, Joachim, and K.-H. Neeb, eds. Lie-Gruppen und Lie-Algebren. Wiesbaden: Vieweg Verlag, 1991.
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Hilgert, Joachim. “Onishchik, A.L., Und E.B. Vinberg. Lie Groups and Algebraic Groups (Springer, New York, 1990).” Zentralblatt, 1991.
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Rösler, Margit. “On Optimal Linear Mean Estimators for Weakly Stationary Stochastic Processes.” In Orthogonal Polynomials and Their Applications (Erice, 1990), 373–378. IMACS Ann. Comput. Appl. Math., 9, 1991.
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