1. R. Alam, On the construction of nearest defective matrices to a normal matrix, NA Report No.433, MCCM, Manchester, UK, September, 2003
2. R. Alam. S. Bora, On sensitivity of eigenvalues and eigendecompositions of matrices, Linear Algebra Appl., in press (doi:10.1016/j.laa.2004.10.013)
3. R.A. Lippert, A. Edelman, The computation and sensitivity of double eigenvalues, in: Z. Chen, Y. Li, C.A. Micchelli, Y. Xu (Eds.), Advances in Computational Mathematics: Proc. Gaungzhou International Symposium, Dekker, New York, 1999, pp. 353–393
4. A formula for the 2-norm distance from a matrix to the set of matrices with multiple eigenvalues;Malyshev;Numer. Math.,1999
5. Properties of a matrix with a very ill-conditioned eigenproblem;Ruhe;Numer. Math.,1970