1. Anderson, B.D.O. and Moore, J.B., Optimal
Filtering, Englewood Cliffs, NJ: Prentice Hall, 1979.
2. Hassibi, B., Sayed, A., and Kailath, T., Indefinite
Quadratic Estimation and Control: a Unified Approach to $$\mathcal {H}_2
$$ and
$$
\mathcal {H}_{\infty }$$ Theories, Philadelphia: SIAM, 1999.
3. Simon, D., Optimal State Estimation: Kalman,
$$
\mathcal {H}_{\infty }$$, and Nonlinear Approaches, New York:
Wiley, 2006.
4. Vladimirov, I.G., Kurdjukov, A.P., and Semyonov, A.V., Anisotropy of signals
and the entropy of linear stationary systems, Dokl.
Math., 1995, vol. 51, pp. 388–390.
5. Vladimirov, I.G., Kurdjukov, A.P., and Semyonov, A.V., On computing the
anisotropic norm of linear discrete-time-invariant systems, Proc. 13
IFAC World Congr. (1996), pp. 179–184.