1. A. R. Amir-Moez and A. Horn, “Singular Values of a Matrix”, Amer. Math. Monthly, v. 65, Dec. 1958, pp. 742–748.
2. G. Burns, Introduction to Group Theory with Applications, Academic Press, 1977, p. 341.
3. C. I. Byrnes, and J. C. Willems, “Adaptive Stabilization of Multi-Variable Linear Systems”, Proc. of the 23rd IEEE Conf. on Decision and Control, Las Vegas, NV, 1984, pp. 1574–1577.
4. B. Mårtensson, Adaptive Stabilization, Ph.D. Dissertation, 1984, Lund Institute of Technology.
5. A. S. Morse , “New Directions in Parameter Adaptive Control”, Proc. of the 23rd IEEE Conf. on Decision and Control, Las Vegas, NV, 1984, pp. 1566–1568.