1. D. Braess. Finite elements; Theory, fast solvers, and applications in solid mechanics. Cambridge University Press, 1997.
2. J. H. Bramble. Multigrid Methods, volume 294 of Pitman Research Notes in Mathematical Sciences. Longman Scientific & Technical, Essex, England, 1
3. J. H. Bramble, J. E. Pasciak, J. Wang, and J. Xu. Convergence estimates for multigrid algorithms without regularity assumptions. Math. Comp., 57:23–45, 1991.
4. W. L. Briggs, V. E. Henson, and S. F. McCormick. A Multigrid Tutorial. SIAM Books, 2nd edition, 1996.
5. A. M. Bruaset. A Survey of Preconditioned Iterative Methods. Addison-Wesley Pitman, 1995.