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P.E. Crouch, A.J. van der Schaft, "Characterization of Hamiltonian input-output systems'', pp. 27-46 in Dynamics and Control of Multibody Systems, (Eds. J.E. Marsden, P.S. Krishnaprasad, J.C. Simo), Contemporary Mathematics, Vol. 97, AMS, Providence, 1989.
R. Marino, W. Respondek, A.J. van der Schaft, "Almost
disturbance decoupling for
single-input single-output nonlinear systems'', IEEE Trans. Automatic
Control, AC-34, pp. 1013--1017, 1989.
A.J. van der Schaft, "Representing a nonlinear state space system as a set of higher-order differential equations in the inputs and outputs'', Systems & Control Letters, 12, pp. 151--160, 1989.
A.J. van der Schaft, "System theory and mechanics'', pp. 426-452 in Three Decades of Mathematical System Theory, (Eds. H. Nijmeijer, J.M. Schumacher), Lect. Notes in Control and Inform. Sci., vol. 135, Springer, Berlin, 1989.
A.J. van der Schaft, "Hamiltonian control systems: decomposition and clamped dynamics'', pp. 441-458 in Dynamics and Control of Multibody Systems, (Eds. J.E. Marsden, P.S. Krishnaprasad, J.C. Simo), Contemporary Mathematics, Vol. 97, AMS, Providence, 1989.
A.J. van der Schaft, "Transformations of nonlinear systems under external equivalence'', pp. 33-43, in New trends in nonlinear control theory, (Eds. J. Descusse, M. Fliess, A. Isidori, D. Leborgne), Lect. Notes in Control and Inform. Sci., vol. 122, Springer, Berlin, 1989.
A.J. van der Schaft, "Structural properties of realizations of external differential systems'', pp. 246-251 in Preprints IFAC Symposium Nonlinear Control Systems Design, (ed. A. Isidori), Capri, Italy, June 1989.
R. Marino, W. Respondek, A.J. van der Schaft, "Direct approach to almost disturbance decoupling and almost input-output decoupling'', Int. J. Control, 48, pp. 353--383, 1988.
R. Marino, W. Respondek, A.J. van der Schaft, "A new approach to almost decoupling problems for linear and nonlinear systems, pp. 459-468 in Analysis and Control of Nonlinear Systems, (Eds. C.I. Byrnes, C.F. Martin, R.E. Saeks), North-Holland, Amsterdam, 1988.
R. Marino, W. Respondek, A.J. van der Schaft, "Almost disturbance decoupling for multivariable nonlinear systems: a sufficient condition'', pp. 259-269 in Analysis Optimization of Systems, (Eds. A. Bensoussan, J.L. Lions), Lect. Notes in Control and Information Sciences, Vol. 111, Springer, 1988.
A.J. van der Schaft, "On clamped dynamics of nonlinear systems'', pp. 499-506 in Analysis and Control of Nonlinear Systems (Eds. C.I. Byrnes, C.F. Martin, R.E. Saeks), North-Holland, Amsterdam, 1988.
P.E. Crouch, A.J. van der Schaft, Variational and Hamiltonian control systems, Lect. Notes in Control and Information Sciences, Vol. 101, Springer-Verlag, Berlin, 1987, p. 121.
P.E. Crouch, A.J. van der Schaft, "Hamiltonian and self-adjoint control systems'', Systems & Control Letters, 8, pp. 289--295, 1987.
P.E. Crouch, A.J. van der Schaft, "Characterization of Hamiltonian input-output systems, in Proc. 26th IEEE Conf. on Decision and Control, pp. 1423-1428, Los Angeles, December 1987.
A.J. van der Schaft, "Symmetries in optimal control'', SIAM J. Control & Opt., 25, pp. 245--259, 1987.
A.J. van der Schaft, "Equations of motion for Hamiltonian systems with constraints'', J. Physics A: Math. Gen., 20, pp. 3271--3277, 1987.
A.J. van der Schaft, "On realization of nonlinear systems described by higher-order differential equations'', Mathematical Systems Theory, 19, pp. 239-275, 1987. Correction Mathematical Systems Theory, 20, pp. 305-306, 1987.
A.J. van der Schaft, "Hamiltonian and quantum mechanical control systems'', Proc. 4th Int. Seminar Mathematical Theory Dynamical Systems and Microphysics; Information Complexity and Control in Quantum Physics, (Eds. A. Blaquiere, S. Diner, G. Lochak), Udine, September 4-13, 1985, pp. 277-296, CISM Courses and Lectures No. 294, Springer, Wien, 1987.
A.J. van der Schaft, "A realization procedure for systems of nonlinear higher-order differential equations'', in Proc. 10th IFAC World Congress on Automatic Control, July 1987, Munich, BRD 1987, vol. 8, pp. 97-102.
H. Nijmeijer, A.J. van der Schaft, "Input-output decoupling of Hamiltonian systems: The nonlinear case'', pp. 300-313 in Proc. 7th Int. Conf. on Analysis and Optimization of Systems, June 25-27, 1986, Antibes, Eds. A. Bensoussan, J.L. Lions, Lect. Notes in Control and Inform. Sci., 83, Springer, Berlin, 1986.
A.J. van der Schaft, "Stabilization of Hamiltonian systems'', Nonlinear Analysis, Theory, Methods & Applications, 10, pp. 1021--1035, 1986.
A.J. van der Schaft, "On feedback control of Hamiltonian systems'', pp. 273-290 in Theory and Applications of Nonlinear Control Systems, Eds. C.I. Byrnes, A. Lindquist (papers presented at the 7th Int. Symp. Mathematical Theory of Networks and Systems, June 10-14, 1985, Stockholm), North-Holland, Amsterdam, 1986.
A.J. van der Schaft, "Optimal control and Hamiltonian input-output systems'', pp. 389-407 in Algebraic and Geometric Methods in Nonlinear Control Theory, Eds. M. Fliess, M. Hazewinkel, Reidel, Dordrecht, 1986.
A.J. van der Schaft, "Realization of higher-order nonlinear differential equations", pp. 198-202 in Proc. 25th Conf. Decision and Control, Athene, 1986.
A.J. van der Schaft, "On symmetries in optimal control'', pp. 482-486 in Proc. 25th IEEE Conf. Decision and Control, Athene, 1986.
H. Nijmeijer, A.J. van der Schaft, "Input-output decoupling of Hamiltonian systems: The linear case'', Systems & Control Letters, 6, pp. 53--58, 1985.
H. Nijmeijer, A.J. van der Schaft "Partial symmetries for nonlinear systems'', Mathematical Systems Theory, 18, pp. 79--96, 1985.
A.J. van der Schaft, "On nonlinear observers'', IEEE Trans. Automatic Control, AC-30, pp. 1254--1256, 1985.
A.J. van der Schaft, "Controlled invariance for Hamiltonian sysems'', Mathematical Systems Theory, 18, pp. 257--291, 1985.