Hauptman, Ami, Achiya Elyasaf, and Moshe Sipper. “Evolving Hyper Heuristic-Based Solvers for Rush Hour and FreeCell”. Proceedings of the International Symposium on Combinatorial Search 1, no. 1 (August 25, 2010): 149–150. Accessed May 26, 2026. https://ojs.aaai.org/index.php/SOCS/article/view/18150.