Lawal HB, Sundheim RA. Generating Factor Variables for Asymmetry, Non-independence and Skew-symmetry Models in Square Contingency Tables using SAS. J. Stat. Soft. [Internet]. 2002 Sep. 3 [cited 2024 Nov. 21];7(8):1-23. Available from: https://www.jstatsoft.org/index.php/jss/article/view/v007i08