Overton, R. C. (2001). "Moderated multiple regression for interactions involving categorical variables: a statistical control for heterogeneous variance across two groups". Psychol Methods. 6 (3): 218–33. doi:10.1037/1082-989X.6.3.218. PMID11570229.
Overton, R. C. (2001). "Moderated multiple regression for interactions involving categorical variables: a statistical control for heterogeneous variance across two groups". Psychol Methods. 6 (3): 218–33. doi:10.1037/1082-989X.6.3.218. PMID11570229.