Sadeqi, Mehdi, and Howard Hamilton. “Efficient Representation of Pattern Databases Using Acyclic Random Hypergraphs”. Proceedings of the International Conference on Automated Planning and Scheduling 26, no. 1 (March 30, 2016): 258–266. Accessed May 9, 2026. https://ojs.aaai.org/index.php/ICAPS/article/view/13752.