Bibliography
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1. P. G. CIARLET: "Introduction to numerical matrix analysis and optimization" _ MASSON (1985).


2. G. H. GOLUB, C. REINSCH "Singular value decomposition and least squares solutions" in "Handbook for Automatic Computation - Linear Algebra, Vol. 2" J.H. WILKHINSON, C. REINSH Editors _ & Least Squares Solutions" in "Handbook for Automatic Computation - Linear Algebra, Vol. 2" J.H., C., C. Editors _ & Least Squares Solutions, and Least Squares Solutions" SPINGER VERLAG


3. P. LASCAUX, R. THEODOR: "Numerical matrix analysis applied to engineering art", volumes 1 and 2 _ MASSON (1986).