1. J. H. Wilkinson, The Algebraic Eigenvalue Problem, Clarendon Press, Oxford (1965).
2. F. R. Gantmakher (Gantmacher), The Theory of Matrices, Vols. I and II, Chelsea, New York (1959).
3. S. K. Godunov, The Solution of System of Linear Equations [in Russian], Nauka, Moscow (1980).