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2. I. Barrodale and C. Phillips (1975) “An improved algorithm for discrete Chebyshev linear approximation” in “Proceedings of the Fourth Manitoba Conference on Numerical Mathematics” (Utalitas Mathematica Publishing Inc., Winnipeg).
3. “An improved algorithm for discrete L1, linear approximation”;Barrodale;SIAM J. Numer. Anal.,1973
4. “A numerically stable form of the simplex algorithm”;Gill;Linear Algebra and its Applics.,1973
5. K. Madsen and M. J. D. Powell (1975) “A Fortran subroutine that calculates the minimax solution of linear equations subject to bounds on the variables”, Report R. 7954 (A.E.R.E. Harwell).