Backward error, sensitivity, and refinement of computed solutions of algebraic Riccati equations. - Ali R. Ghavimi; Alan J. Laub (Numer. Linear Algebra Appl., 1995)

Computation of approximate null vectors of Sylvester and Lyapunov operators. - Ali R. Ghavimi; Alan J. Laub (IEEE Trans. Autom. Control., 1995)

Residual bounds for discrete-time Lyapunov equations. - Ali R. Ghavimi; Alan J. Laub (IEEE Trans. Autom. Control., 1995)

Numerical Methods for Nearly Singular Constrained Matrix Sylvester Equations. - Ali R. Ghavimi; Alan J. Laub (SIAM J. Matrix Anal. Appl., 1996)