Strand, Matthew, Shalender Bhasin, and Hsiao-Pin Liu. “A Set of Nonparametric Tests for Experiments With Lattice-Ordered Means: Theory, Programs, and Applications”. Journal of Statistical Software 9, no. 6 (March 20, 2004): 1–16. Accessed April 28, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v009i06.