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2. L. E. Dickson, New First Course in the Theory of Equations, Wiley, New York, 1939.
3. G. E. Forsythe and C. B. Moler, Computer Solution of Linear Algebraic Systems, Prentice-Hall, Englewood Cliffs, N.J., 1967.
4. Peter Henrici, Applied and Computational Complex Analysis, Vol. 1, Wiley, New York, 1974.