Fu, Zhenyong, Zhiwu Lu, Horace Ip, Yuxin Peng, and Hongtao Lu. “Symmetric Graph Regularized Constraint Propagation”. Proceedings of the AAAI Conference on Artificial Intelligence 25, no. 1 (August 4, 2011): 350–355. Accessed May 7, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/7897.