ZHANG, Ying; PREISSER, John S.; LI, Fan; TURNER, Elizabeth L.; RATHOUZ, Paul J. CRTFASTGEEPWR: A SAS Macro for Power of Generalized Estimating Equations Analysis of Multi-Period Cluster Randomized Trials with Application to Stepped Wedge Designs. Journal of Statistical Software, Code Snippets, [S. l.], v. 108, n. 1, p. 1–27, 2024. DOI: 10.18637/jss.v108.c01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v108c01. Acesso em: 7 dec. 2025.