Friedrich, Sarah, Frank Konietschke, and Markus Pauly. “GFD: An R Package for the Analysis of General Factorial Designs”. Journal of Statistical Software, Code Snippets 79, no. 1 (July 13, 2017): 1–18. Accessed March 29, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v079c01.