1. Ball JA, Ran ACM (1987) Optimal Hankel norm model reductions and Wiener-Hopf factorization I: the canonical case. SIAM J Control Optim 25(2):362–382
2. Ball JA, Helton JW, Verma M (1991) A factorization principle for stabilization of linear control systems. Int J Robust Nonlinear Control 1(4):229–294
3. Boyd SP, Barratt CH (1991) Linear controller design: limits of performance. Prentice Hall, Englewood Cliffs
4. Curtain RF, Zwart HJ (1995) An introduction to infinite-dimensional linear systems theory. Volume 21 of texts in applied mathematics. Springer, New York
5. Dahleh MA, Diaz-Bobillo IJ (1995) Control of uncertain systems: a linear programming approach. Prentice Hall, Upper Saddle River