Freund, R. J., Littell, R. C., and Spector, P. C. (1991). SAS System for Linear Models. Cary, NC: SAS Institute Inc.
Goodnight, J. H. (1978). Tests of Hypotheses in Fixed-Effects Linear Models. Technical Report R-101, SAS Institute Inc., Cary, NC.
Goodnight, J. H. (1979). “A Tutorial on the Sweep Operator.” American Statistician 33:149–158.
Harvey, W. R. (1960). Least-Squares Analysis of Data with Unequal Subclass Frequencies. Technical Report ARS 20-8, Agriculture Research Service, U.S. Department of Agriculture.
Henderson, C. R. (1953). “Estimation of Variance and Covariance Components.” Biometrics 9:226–252.
Milliken, G. A., and Johnson, D. E. (1984). Designed Experiments. Vol. 1 of Analysis of Messy Data. Belmont, CA: Lifetime Learning Publications.