1. Acton, F. S. (1990): Numerical Methods That Work, Mathematical Association of America.
2. Acton, F. S. (1995): Real Computing Made Real, Princeton University Press, Princeton, New Jersey.
3. Brent, R. P. (2002): Algorithms for Minimization Without Derivatives, Dover, New York
4. Broyden, C. G. (1965): A Class of Methods for Solving Nonlinear Simultaneous Equations, Math. Comp., 19, 577.
5. Broyden, C. G. (1969): A New Method of Solving Nonlinear Simultaneous Equations, Comp. J., 12, 94.