Sample sizes required to detect interactions between two binary fixed-effects in a mixed-effects linear regression model. - Andrew C. Leon; Moonseong Heo (Comput. Stat. Data Anal., 2009)

Sample size requirements to detect an intervention by time interaction in longitudinal cluster randomized clinical trials with random slopes. - Moonseong Heo; Xiaonan Xue; Mimi Y. Kim (Comput. Stat. Data Anal., 2013)