@article{aerialintelligentreflectingsurfacejoint,
  title = {Aerial Intelligent Reflecting Surface: Joint Placement and Passive Beamforming Design with 3D Beam Flattening},
  author = {Haiquan Lu and Yong Zeng and Shi Jin and Rui Zhang},
  year = {2020},
  eprint = {2007.13295},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2007.13295v2},
}