1. M.C. Biggs, “A note on minimisation algorithms which make use of nonquadratic properties of the objective function”,Journal of the Institute of Mathematics and its Applications 12 (1973) 337.
2. M.C. Biggs, “Some improvements to the OPTIMA subroutines”, Numerical Optimisation Centre Technical Report No. 69, The Hatfield Polytechnic, Hertfordshire (1975).
3. K.M. Brown and J.E. Dennis, “New computational algorithms for minimising a sum of squares of nonlinear functions”, Computer Science Department Report 71-6, Yale University New Haven, CT (1971).
4. R. Coleman, British Aircraft Corporation, private communication.
5. J.E. Dennis, “Some computational techniques for the nonlinear least squares problem”, in: G.D. Byrne and C.A. Hall, eds.,Numerical solution of nonlinear algebraic equations (Academic Press, New York, 1974).