1. Colville, A. R. (1968), “A comparative study on non-linear programming codes”, IBM, New York Scientific Center Report No. 320-2949.
2. “A class of methods for non-linear programming with termination and convergence properties”;Fletcher,1969
3. “A review of methods for unconstrained optimization”;Fletcher,1969
4. Fletcher, R. (1970), “A general quadratic programming algorithm”, Harwell report T. P. 401.
5. “Acceleration techniques for non-linear programming”;Fletcher,1969