Petropoulos , Celestine. 2023. “Recent Advances in Optimized Sparse Spatial Self-Nested Graph Neural Networks for Secure MU-MIMO-OFDM Systems: Channel Estimation, Attack Detection and Mitigation – A Systematic Review”. International Journal of Electrical, Electronics and Computer Systems 12 (1):71-79. https://doi.org/10.65521/ijeecs.v12i1.2633.