Liaskos C, Tsioliaridou A, Georgopoulos K, Morianos I, Ioannidis S, Salem I, Manessis D, Schmid S, Tyrovolas D, Tegos SA, et al. XR-RF Imaging Enabled by Software-Defined Metasurfaces and Machine Learning: Foundational Vision, Technologies and Challenges. IEEE Access [Internet]. 2022;10:119841 ? 119862.