@article{
  author = {E. Bj\"{o}rnson and H. Wymeersch and B. Matthiesen and P. Popovski and L. Sanguinetti and E. de Carvalho},
  year = {2022},
  month = {Mar},
  title = { Reconfigurable Intelligent Surfaces: A Signal Processing Perspective With Wireless Applications},
  volume = {39},
  number = {2},
  pages = {135-158},
  URL = {https://doi.org/10.1109/MSP.2021.3130549},
  journal={IEEE Signal Processing Magazine}
}