1. J. Ackermann, “Does it suffice to check a subset of multilinear parameters in robustness analysis?,” IEEE Trans, on Automatic Control, vol. 37, pp. 487–488, 1992.
2. J. Ackermann, A. Bartlett, D. Kaesbauer, W. Sienel, and R. Steinhauser, Robust control: Systems with uncertain physical parameters. London: Springer, 1993.
3. J. Bals, Aktive Schwingungsdampfung flexibler Strukturen. PhD thesis, Universität Karlsruhe (TH ), 1989.
4. B. Barmish, J. Ackermann, and H. Hu, “The tree structured decomposition: a new approach to robust stability analysis,” in Proc. Conf. on Information Sciences and Systems, (Princeton), 1990.
5. A. Bartlett, C. Hollot, and Huang-Lin, “Root locations of an entire polytope of polynomials: it suffices to check the edges,” Mathematics of Control, Signals and Systems, vol. 1, pp. 61–71, 1988.