Sturtevant, Nathan. “A Sparse Grid Representation for Dynamic Three-Dimensional Worlds”. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment 7, no. 1 (October 9, 2011): 73-78. Accessed May 17, 2024. https://ojs.aaai.org/index.php/AIIDE/article/view/12438.