Command Reference : User-Defined Optimization : References
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Dennis, J. E. and R. B. Schnabel (1983). “Secant Methods for Systems of Nonlinear Equations,” Numerical Methods for Unconstrained Optimization and Nonlinear Equations. Prentice-Hall, London.
More and Sorensen (1983). Computing a Trust Region Step, SIAM Journal of Scientific Statistical Computing, Vol. 4, 553–572.