@article{chaipanya2014vertical,
  title={Vertical Beamforming Inuence on Cellular Networks},
  author={Chaipanya, Pichaya and Uthansakul, Monthippa and Uthansakul, Peerapong},
  journal={ECTI Transactions on Electrical Engineering, Electronics, and Communications},
  volume={12},
  number={1},
  pages={73--81},
  year={2014}
}