Gnad, Daniel, Marcel Steinmetz, Mathäus Jany, Jörg Hoffmann, Ivan Serina, and Alfonso Gerevini. 2021. “Partial Delete Relaxation, Unchained: On Intractable Red-Black Planning and Its Applications”. Proceedings of the International Symposium on Combinatorial Search 7 (1):45-53. https://doi.org/10.1609/socs.v7i1.18391.