Horčík, Rostislav, and Daniel Fišer. “Endomorphisms of Classical Planning Tasks”. Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 13 (May 18, 2021): 11835-11843. Accessed March 28, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/17406.