Yang, Yi, Heng Shen, Feiping Nie, Rongrong Ji, and Xiaofang Zhou. “Nonnegative Spectral Clustering With Discriminative Regularization”. Proceedings of the AAAI Conference on Artificial Intelligence 25, no. 1 (August 4, 2011): 555–560. Accessed May 7, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/7922.