BibTex format
@article{Zhang:2020:10.1109/TVT.2020.2973073,
author = {Zhang, H and Di, B and Song, L and Han, Z},
doi = {10.1109/TVT.2020.2973073},
journal = {IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY},
pages = {4498--4502},
title = {Reconfigurable Intelligent Surfaces Assisted Communications With Limited Phase Shifts: How Many Phase Shifts Are Enough?},
url = {http://dx.doi.org/10.1109/TVT.2020.2973073},
volume = {69},
year = {2020}
}