Nguyen, Van-Long, Dac-Binh Ha, Duc-Dung Tran, and Yoonill Lee. 2019. “Enhancing Physical Layer Security for Cooperative Non-Orthogonal Multiple Access Networks With Artificial Noise”. EAI Endorsed Transactions on Industrial Networks and Intelligent Systems 6 (20):e4. https://doi.org/10.4108/eai.13-7-2018.159945.