Purposeful selection of variables in logistic regression. - Zoran Bursac; C. Heath Gauss; David Keith Williams; David W. Hosmer (Source Code Biol. Medicine, 2008)

Three algorithms and SAS macros for estimating power and sample size for logistic models with one or more independent variables of interest in the presence of covariates. - David Keith Williams; Zoran Bursac (Source Code Biol. Medicine, 2014)