Li, Zechao, Yi Yang, Jing Liu, Xiaofang Zhou, and Hanqing Lu. “Unsupervised Feature Selection Using Nonnegative Spectral Analysis”. Proceedings of the AAAI Conference on Artificial Intelligence 26, no. 1 (September 20, 2021): 1026-1032. Accessed May 1, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/8289.