Kawaguchi, Atsushi, and Gary G. Koch. “Sanon: An R Package for Stratified Analysis With Nonparametric Covariable Adjustment”. Journal of Statistical Software 67, no. 9 (October 7, 2015): 1–37. Accessed April 25, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v067i09.