1. A taxonomy for conjugate gradient methods;Ashby;SIAM J. Numer. Anal.,1990
2. Iterative Solution Methods;Axelsson,1994
3. On the rate of convergence of the preconditioned conjugate gradient method;Axelsson;Numer. Math.,1986
4. Templates for the Solution of Linear Systems: Building Blocks for Iterative Methods;Barret,1994
5. T. Barth and T. Manteuffel, Estimating the spectrum of A using the roots of the polynomials associated with the QMR iteration, SIAM J. Matrix Anal. (to appear).