How Fast are Nonsymmetric Matrix Iterations? - Noël M. Nachtigal; Satish C. Reddy; Lloyd N. Trefethen (SIAM J. Matrix Anal. Appl., 1992)

A Hybrid GMRES Algorithm for Nonsymmetric Linear Systems. - Noël M. Nachtigal; Lothar Reichel; Lloyd N. Trefethen (SIAM J. Matrix Anal. Appl., 1992)

An Implementation of the Look-Ahead Lanczos Algorithm for Non-Hermitian Matrices. - Roland W. Freund; Martin H. Gutknecht; Noël M. Nachtigal (SIAM J. Sci. Comput., 1993)

An Implementation of the QMR Method Based on Coupled Two-Term Recurrences. - Roland W. Freund; Noël M. Nachtigal (SIAM J. Sci. Comput., 1994)

Integrating the QMR Method with First Principles Material Science Application Code. - Noël M. Nachtigal; William A. Shelton; G. Malcolm Stocks; Donald M. C. Nicholson; Yang Wang 008 (PP, 1995)

QMRPACK: A Package of QMR Algorithms. - Roland W. Freund; Noël M. Nachtigal (ACM Trans. Math. Softw., 1996)