Gnad, D., Álvaro Torralba, A. Shleyfman, and J. Hoffmann. “Symmetry Breaking in Star-Topology Decoupled Search”. Proceedings of the International Conference on Automated Planning and Scheduling, vol. 27, no. 1, June 2017, pp. 125-34, doi:10.1609/icaps.v27i1.13810.