QMR Smoothing for Lanczos-Type Product Methods Based on Three-Term Rrecurrences. - Klaus J. Ressel; Martin H. Gutknecht (SIAM J. Sci. Comput., 1998)

A Boundary Functional for the Least-Squares Finite- Element Solution of Neutron Transport Problems. - Thomas A. Manteuffel; Klaus J. Ressel; Gerhard Starke (SIAM J. Numer. Anal., 1999)

Look-Ahead Procedures for Lanczos-Type Product Methods Based on Three-Term Lanczos Recurrences. - Martin H. Gutknecht; Klaus J. Ressel (SIAM J. Matrix Anal. Appl., 2000)