Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Peng Xu and Zheng Yang and Zhiguo Ding and Zufan Zhang,Optimal Relay Selection Schemes for Cooperative NOMA,IEEE Transactions on Vehicular Technology,0018-9545,Institute of Electrical and Electronics Engineers (IEEE),2018-08,67,8,7851-7855,https://cir.nii.ac.jp/crid/1361137045237480192,https://doi.org/10.1109/tvt.2018.2821900