Ma, Xinge, Jin Wang, and Xuejie Zhang. “Data-Free Black-Box Federated Learning via Zeroth-Order Gradient Estimation”. Proceedings of the AAAI Conference on Artificial Intelligence 39, no. 18 (April 11, 2025): 19314–19322. Accessed May 13, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/34126.