\begin{thebibliography}{1}

\bibitem{Gut*ACTA}
{\sc M.~H. Gutknecht}, Lanczos-type solvers for nonsymmetric linear systems of
  equations, Acta Numerica, 6 (1997), pp.~271--397.

\bibitem{GutRes*1}
{\sc M.~H. Gutknecht and K.~J. Ressel}, Look-ahead procedures for
  {Lanczos}-type product methods based on three-term {Lanczos} recurrences,
  SIAM J. Matrix Anal. Appl., 21 (2000), pp.~1051--1078.

\bibitem{GutRoz*2}
{\sc M.~H. Gutknecht and M.~Rozlo\v{z}n\'{\i}k}, By how much can residual
  minimization accelerate the convergence of orthogonal residual methods?,
  Numerical Algorithms.
\newblock Submitted.

\bibitem{GutRoz*1}
\leavevmode\vrule height 2pt depth -1.6pt width 23pt, Residual smoothing
  techniques: do they improve the limiting accuracy of iterative solvers?, BIT,
   (2001), pp.~...--...

\bibitem{GutStr*1}
{\sc M.~H. Gutknecht and Z.~Strako\v{s}}, Accuracy of two three-term and three
  two-term recurrences for {Krylov} space solvers, SIAM J. Matrix Anal. Appl.,
  22 (2000), pp.~213--229.

\end{thebibliography}