Li C, Mao K, Liang L, Ren D, Zhang W, Yuan Y, et al. Unsupervised Active Learning via Subspace Learning. AAAI [Internet]. 2021 May 18 [cited 2026 May 29];35(9):8332-9. Available from: https://ojs.aaai.org/index.php/AAAI/article/view/17013