Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Liang Chen and Lin Ma and Yubin Xu,Proportional Fairness-Based User Pairing and Power Allocation Algorithm for Non-Orthogonal Multiple Access System,IEEE Access,2169-3536,Institute of Electrical and Electronics Engineers (IEEE),2019,7,,19602-19615,https://cir.nii.ac.jp/crid/1363107368951780096,https://doi.org/10.1109/access.2019.2896181