Beaton, A. E., Rubin, D. B., and Barone, J. L. (1976), “The Acceptability of Regression Solutions: Another Look at Computational Accuracy,” Journal of the American Statistical Association, 71, 158–168.

Gentleman, W. M. (1972), Basic Procedures for Large, Sparse, or Weighted Least Squares Problems, Technical Report CSRR-2068, University of Waterloo, Ontario.

Gentleman, W. M. (1973), “Least Squares Computations by Givens Transformations without Square Roots,” J. Inst. Math. Appl., 12, 329–336.

Lawson, C. L. and Hanson, R. J. (1974), Solving Least Squares Problems, Englewood Cliffs, NJ: Prentice-Hall.

Longley, J. W. (1967), “An Appraisal of Least Squares Programs for the Electronic Computer from the Point of View of the User,” Journal of the American Statistical Association, 62, 819–841.

National Institute of Standards and Technology (1998), “Statistical Reference Data Sets,” http://www.nist.gov/srd/index.htm, last accessed January 29, 2010.

Powell, L. J., Murphy, T. J., and Gramlich, J. W. (1982), “The Absolute Isotopic Abundance and Atomic Weight of a Reference Sample of Silver,” NBS Journal of Research, 87, 9–19.

Wampler, R. H. (1970), “A Report of the Accuracy of Some Widely Used Least Squares Computer Programs,” Journal of the American Statistical Association, 65, 549–563.