Jia, Chaoqi, Longkun Guo, Kewen Liao, Zhigang Lu, Chao Chen, and Jason Xue. “Approximation Algorithm for Constrained K-Center Clustering: A Local Search Approach”. Proceedings of the AAAI Conference on Artificial Intelligence 40, no. 43 (March 14, 2026): 36982–36990. Accessed May 13, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/41026.