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The preconditioning by direct factorization method for solving self-adjoint partial differential equations. In: Preconditioning. Analysis and Applications. Vol. 1. DJ Evans, Editor. Gordon and Breach Sci. Pub.; 1983. pp. 356-378.
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Piecewise monotonic methods for data smoothing. Reseach Essay. Cambridge, U.K. : Department of Applied Mathematics and Theoretical Physics, Univesrity of Cambridge; 1983 pp. 70.