Sellers, Michael. “Otello: A Next-Generation Reputation System For Humans and NPCs”. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment 4, no. 1 (October 22, 2008): 149–154. Accessed May 8, 2026. https://ojs.aaai.org/index.php/AIIDE/article/view/18688.