1. Bauer, F.L., Fike, E.T.: Norms and Exclusion Theorems. Numer. Math.2, 137?144 (1960)
2. Bauer, F.L., Householder, A.S.: Absolute Norms and Characteristic Roots. Numer. Math.3, 241?246 (1961)
3. Chu, K.E., Nichols, N.K.: Robust Pole Assignment by Output Feedback. Proc. 4th Intern. Conf. on Control Theory, Cambridge, U.K., September 1984
4. Chu, K.E.: Exclusion Theorems and The Perturbation Analysis of The Generalized Eigenvalue Problem. Dept. of Maths., Univ. of Reading, U.K., Num. Anal. Rpt. NA/11/85, 1985
5. Golub, G.H., Van Loan, C.: Matrix Computations. The Johns Hopkins University Press, Baltimore 1983