Bisberg, A. J., and R. E. Cardona-Rivera. “SCOPE: Selective Cross-Validation over Parameters for Elo”. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment, vol. 15, no. 1, Oct. 2019, pp. 116-22, https://ojs.aaai.org/index.php/AIIDE/article/view/5233.