1. The Portable, Extensible Toolkit for Scientific Computing, version 2.1.0. http: //www.mcs.anl.gov/petsc, code and documentation, 2001.
2. P-SPARSLIB: a portable library of distributed memory sparse iterative solvers, (version 2.15, May 1997). Technical Report UMSI 95-180, Minnesota Supercomputer Institute, 1995.
3. Domain decomposition algorithms. Acta Numerica 1994; 61-143.
4. Overlapping Schwarz methods on unstructured meshes using non-matching coarse grids
5. Towards a unified theory of domain decomposition algorithms for elliptic problems. in Third International Symposium on Domain Decomposition Methods for Partial Differential Equations, (eds). SIAM: Philadelphia, PA, 1990.