Dellnitz, Michael, Jerrold E. Marsden, Ian Melbourne, and Jürgen Scheurle. “Generic Bifurcations of Pendula.”https://doi.org/10.1007/978-3-0348-7536-3_10__In Bifurcation and Symmetry. Basel, 1992.https://doi.org/10.1007/978-3-0348-7536-3_10 .

Dellnitz, M, I Melbourne, and J E Marsden. “Generic Bifurcation of Hamiltonian Vector Fields with Symmetry.”https://doi.org/10.1088/0951-7715/5/4/008__Nonlinearity, 1992, 979–96.https://doi.org/10.1088/0951-7715/5/4/008 .

Dellnitz, Michael. “Computational Bifurcation of Periodic Solutions in Systems with Symmetry.”https://doi.org/10.1093/imanum/12.3.429__IMA Journal of Numerical Analysis 12, no. 3 (1992): 429–55.https://doi.org/10.1093/imanum/12.3.429 .

Hilgert, Joachim. “Fomenko, A.T. Symplectic Geometry (Gordon and Breach, 1988).” JBer. DMV, 1992.

Hilgert, Joachim, and G. Ólafsson. “Analytic Extensions of Representations, the Solvable Case.” Japan. J. Math. 18 (1992): 213–90.

Hilgert, Joachim. “Controllability on Real Reductive Groups.” Math. Zeitschrift 209 (1992): 463–66.

Lasser, R., and Margit Rösler. “Linear Mean Estimation of Weakly Stationary Stochastic Processes under the Aspects of Optimality and Asymptotic Optimality.”https://doi.org/10.1016/0304-4149(91)90095-t__Stochastic Processes and Their Applications 38, no. 2 (1991): 279–93.https://doi.org/10.1016/0304-4149(91)90095-t .

Hilgert, Joachim. “Varadarajan, V.S. An Introduction to Harmonic Analysis on Semisimple Lie Groups (Cambridge University Press, 1989).” JBer. DMV, 1991.

Hilgert, Joachim. “Terras, A. Harmonic Analysis on Symmetric Spaces I and II (Springer, New York, 1985 Und 1988).” JBer. DMV, 1991.

Hilgert, Joachim, G. Ólafsson, and B. Orsted. “Hardy Spaces on Affine Symmetric Spaces.” J. Reine Und Angew. Math. 415 (1991): 189–218.

Hilgert, Joachim. “Group Theoretical Aspects of Gödels Model.” In Jahrbuch Der Gödel Gesellschaft, edited by Joachim Hilgert. Wien, 1991.

Hilgert, Joachim. “Infinitesimally Generated Subsemigroups of Motion Groups.” Rocky Mount. J. Math. 21 (1991): 865–78.

Hilgert, Joachim, and K.-H. Neeb, eds. Lie-Gruppen und Lie-Algebren. Wiesbaden: Vieweg Verlag, 1991.

Hilgert, Joachim. “Onishchik, A.L., Und E.B. Vinberg. Lie Groups and Algebraic Groups (Springer, New York, 1990).” Zentralblatt, 1991.

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.

Hilgert, Joachim. “Applications of Lie Semigroups in Analysis.” In The Analytical and Topological Theory of Semigroups, edited by K.H. Hofmann and et al. Berlin: De Gruyter, 1990.

Hilgert, Joachim, and K.H. Hofmann. “On the Causal Structure of Homogeneous Manifolds.” Math. Scand. 67 (1990): 119–44.

Dellnitz, Michael, and Bodo Werner. “Computational Methods for Bifurcation Problems with Symmetries—with Special Attention to Steady State and Hopf Bifurcation Points.”https://doi.org/10.1016/0377-0427(89)90150-7__Journal of Computational and Applied Mathematics, 1989, 97–123.https://doi.org/10.1016/0377-0427(89)90150-7 .

Hilgert, Joachim, and K.H. Hofmann. “Compactly Embedded Cartan Algebras and Invariant Cones in Lie Algebras.” Advances Math. 75 (1989): 168–201.

Hilgert, Joachim. “A Note on Howe’s Oscillator Semigroup.” Ann. Inst. Fourier 39 (1989): 663–88.