Chen, Jingwei, and Nathan R. Sturtevant. “Necessary and Sufficient Conditions for Avoiding Reopenings in Best First Suboptimal Search With General Bounding Functions”. Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 5 (May 18, 2021): 3688-3696. Accessed May 26, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/16485.