Churchill, David, and Michael Buro. “Hierarchical Portfolio Search: Prismata’s Robust AI Architecture for Games With Large Search Spaces”. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment 11, no. 1 (November 19, 2015): 16–22. Accessed May 26, 2026. https://ojs.aaai.org/index.php/AIIDE/article/view/12787.