BibTex format
@article{Liu:2017:10.1109/JSAC.2017.2726718,
author = {Liu, Y and Qin, Z and Elkashlan, M and Nallanathan, A and McCann, JA},
doi = {10.1109/JSAC.2017.2726718},
journal = {IEEE Journal on Selected Areas in Communications},
pages = {2667--2680},
title = {Non-orthogonal multiple access in large-scale heterogeneous networks},
url = {http://dx.doi.org/10.1109/JSAC.2017.2726718},
volume = {35},
year = {2017}
}