Cudeck (1996)
Mixed-effects models in the study of individual differences with repeated measures data. Multivariate Behavioral Research. 31, 371-403.
http://www.cnsspectrums.com/pdf/art_460.pdf
http://www.unc.edu/~johnhipp/hipp_bauer_curran_bollen_2004.pdf
http://www.nd.edu/~jrausch/Rausch,DesignNegEx.pdf
http://www.psych.umn.edu/faculty/Cudeck.htm