Qiu, Z., C. Chen, M. Marathe, S. Ravi, D. J. Rosenkrantz, R. Stearns, and A. Vullikanti. “Finding Nontrivial Minimum Fixed Points in Discrete Dynamical Systems: Complexity, Special Case Algorithms and Heuristics”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 36, no. 9, June 2022, pp. 9422-30, doi:10.1609/aaai.v36i9.21174.