Memory-Efficient Gradient Unrolling for Large-Scale Bi-level Optimization - Shen, Qianli; Wang, Yezhen; Yang, Zhouhao; Li, Xiang; Wang, Haonan; Zhang, Yang; Scarlett, Jonathan; Zhu, Zhanxing; Kawaguchi, Kenji (Advances in Neural Information Processing Systems, 2024)