Huang, Feihu, Bin Gu, Zhouyuan Huo, Songcan Chen, and Heng Huang. “Faster Gradient-Free Proximal Stochastic Methods for Nonconvex Nonsmooth Optimization”. Proceedings of the AAAI Conference on Artificial Intelligence 33, no. 01 (July 17, 2019): 1503–1510. Accessed May 31, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/3963.