@ARTICLE {29853,
author={Z.  Zhou and Y. Zhang and S.M. Mumtaz},
doi={10.1109/MNET.001.1900188},
journal={IEEE Network},
title={Blockchain-Empowered Secure Spectrum Sharing for 5G Heterogeneous Networks},
year={2020},
month={January},
volume={34},
number={1},
pages={24-31},
ISSN={0890-8044}
}