Recommended Readings
See the following texts for more information on linear mixed models:
McCulloch, C. E., and S. R. Searle. 2001. Generalized, Linear, and Mixed Models. New York: John Wiley and Sons.
Brown, H., and R. Prescott. 1999. Applied mixed models in medicine. New York: John Wiley and Sons.
Verbeke, G., and G. Molenberghs. 2000. Linear mixed models for longitudinal data. New York: Springer-Verlag.