CodeGEMM: A Codebook-Centric Approach to Efficient GEMM in Quantized LLMs - Park, Gunho; Bae, Jeongin; Kim, Byeongwook; Park, Baeseong; Ryu, Jiwon; Kim, Hoseung; Kwon, Se Jung; Lee, Dongsoo (Advances in Neural Information Processing Systems, 2025)