- Reconfigurable intelligent surfaces in 6G radio localization: A survey of recent developments, opportunities, and challengesUmer, Anum; Müürsepp, Ivo; Alam, Muhammad Mahtab; Wymeersch, HenkIEEE Communications Surveys & Tutorials2025 / 36 p http://doi.org/10.1109/COMST.2025.3536517