1. J. Abadie and J. Carpentier, “Generalization of the Wolfe reduced gradient method to the case of nonlinear constraints”, in:Optimization, Ed. R. Fletcher (Academic Press, New York, 1969) pp. 37–47.
2. R. Fletcher, “A FORTRAN subroutine for minimization by the method of conjugate gradients”, Rept. AERE-R 7073, Harwell (1972).
3. R. Fletcher and C.M. Reeves, “Function minimization by conjugate gradients”,Computer Journal 7 (1964) 149–154.
4. C.R. Gagnon, R.H. Hicks, S.L.S. Jacoby and J.S. Kowalik, “A mathematical model and a digital computer program for automatic hydroelectric power system critical period analysis”, Rept. BCS-G0216, Boeing Computer Services, Inc. (1973).
5. S.L.S. Jacoby, J.S. Kowalik and J.T. Pizzo,Iterative Methods for Nonlinear Optimization Methods, Prentice—Hall series in automatic computation (Prentice—Hall, Englewood Cliffs, N.J., 1972).