1. L. Armijo. Minimization of functions having Lipschitz continuous first partial derivatives. Pacific Journal of Mathematics, 16: 1–3, 1966.
2. D.P. Bertsekas. Nonlinear programming. Athena Scientific, Belmont, Massachusetts, 1995.
3. J.V. Burke and Maijian Qian. The variable metric proximal point algorithm, I: Basic convergence theory, 1996. Department of Mathematics, University of Washington, Seattle, WA.
4. R.S. Dembo, S.0 Eisenstat, and T. Steihaug. Inexact Newton methods. SIAM Journal of Numerical Analysis, 19: 400–408, 1982.
5. J.E. Dennis and R.B. Schnabel. Numerical Methods for Unconstrained Optimization and Nonlinear Equations. Prentice-Hall, Englewood Cliffs, N.J., 1983.