Lauer, Pascal, Álvaro Torralba, Daniel Höller, and Jörg Hoffmann. “Continuing the Quest for Polynomial Time Heuristics in PDDL Input Size: Tractable Cases for Lifted hᵃᵈᵈ”. Proceedings of the International Conference on Automated Planning and Scheduling 35, no. 1 (September 16, 2025): 74–83. Accessed May 25, 2026. https://ojs.aaai.org/index.php/ICAPS/article/view/36103.