BESA: Pruning Large Language Models with Blockwise Parameter-Efficient Sparsity Allocation - Xu, Peng; Shao, Wenqi; Chen, Mengzhao; Tang, Shitao; Zhang, Kaipeng; Peng, Gao; An, Fengwei; Qiao, Yu; Luo, Ping (International Conference on Learning Representations, 2024)