Computing Probabilistic Bounds for Extreme Eigenvalues of Symmetric Matrices with the Lanczos Method. - Jos L. M. van Dorsselaer; Michiel E. Hochstenbach; Henk A. van der Vorst (SIAM J. Matrix Anal. Appl., 2001)

Several Concepts to Investigate Strongly Nonnormal Eigenvalue Problems. - Jos L. M. van Dorsselaer (SIAM J. Sci. Comput., 2003)