Zhi, Weifeng, Xiang Wang, Buyue Qian, Patrick Butler, Naren Ramakrishnan, and Ian Davidson. 2013. “Clustering With Complex Constraints — Algorithms and Applications”. Proceedings of the AAAI Conference on Artificial Intelligence 27 (1):1056-62. https://doi.org/10.1609/aaai.v27i1.8663.