@ARTICLE {33625,
author={J.  Kassam and D. Castanheira and A.  Silva and R. Dinis and A. Gameiro},
doi={10.3390/electronics12041001},
journal={Electronics (Switzerland)},
title={A Review on Cell-Free Massive MIMO Systems},
year={2023},
month={February},
volume={12},
number={4},
pages={1001-10018},
ISSN={2079-9292}
}