Approximate solution of large sparse Lyapunov equations. - Thorkell Gudmundsson; Alan J. Laub (IEEE Trans. Autom. Control., 1994)

Small-Sample Statistical Estimates for Matrix Norms. - Thorkell Gudmundsson; Charles S. Kenney; Alan J. Laub (SIAM J. Matrix Anal. Appl., 1995)

Small-Sample Statistical Estimates for the Sensitivity of Eigenvalue Problems. - Thorkell Gudmundsson (SIAM J. Matrix Anal. Appl., 1997)