%0 Journal Article %T Spectral Efficiency and Scalability Analysis for Multi-Level Cooperative Cell-Free Massive MIMO Systems %A Li, Jiamin %A Sun, Xiaoyu %A Zhu, Pengcheng %A Wang, Dongming %A You, Xiaohu %J Electrical Engineering and Systems Science %V 2023 %N 2302 %D 2023-02-16 %~ DeepDyve