Bounds on Changes in Ritz Values for a Perturbed Invariant Subspace of a Hermitian Matrix. - Merico E. Argentati; Andrew V. Knyazev; Christopher C. Paige; Ivo Panayotov (SIAM J. Matrix Anal. Appl., 2008)

Hessenberg Matrix Properties and Ritz Vectors in the Finite-Precision Lanczos Tridiagonalization Process. - Christopher C. Paige; Ivo Panayotov (SIAM J. Matrix Anal. Appl., 2011)