1. Stephen T. Barnard and Horst D. Simon. A fast multilevel implementation of recursive spectral bisection for partitioning unstructured problems. Concurrency: Practice and Experience, 6:101–117, 1994.
2. Michael W. Berry, Bruce Hendrickson, and Padma Raghavan. Sparse matrix reordering schemes for browsing hypertext. In James Renegar, Michael Shub, and Steve Smale, editors, The Mathematics of Numerical Analysis, volume 32 of Lectures in Applied Mathematics, pages 99–122. American Mathematical Society, 1996.
3. Roland W. Freund and Noël M. Nachtigal. QMR: A quasi-minimal residual method for non-Hermitian linear systems. Numer. Math., 60:315–339, 1991.
4. Michael R. Garey and David S. Johnson. Computers and Intractability: A Guide to the Theory of NP-Completeness. W. H. Freeman and Company, New York, 1979.
5. Technical Report TR-PA-93-50;M. Hegland,1993