Schauberger, Gunther, and Gerhard Tutz. “BTLLasso: A Common Framework and Software Package for the Inclusion and Selection of Covariates in Bradley-Terry Models”. Journal of Statistical Software 88, no. 9 (March 26, 2019): 1–29. Accessed November 24, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v088i09.