Lawal, H. Bayo, and Richard A. Sundheim. “Generating Factor Variables for Asymmetry, Non-Independence and Skew-Symmetry Models in Square Contingency Tables Using SAS”. Journal of Statistical Software 7, no. 8 (September 3, 2002): 1–23. Accessed December 3, 2022. https://www.jstatsoft.org/index.php/jss/article/view/v007i08.