@article{han2021joint,
  title={Joint Cache Placement and Cooperative Multicast Beamforming in Integrated Satellite-Terrestrial Networks},
  author={Han, Dairu and Liao, Wenhe and Peng, Haixia and Wu, Huaqing and Wu, Wen and Shen, Xuemin},
  journal={IEEE Transactions on Vehicular Technology},
  volume={71},
	number={3},
	pages={3131–3143},
	year={Mar. 2022},
	publisher={IEEE}
}