@article{uavtrajectoryandmultiuserbeamforming,
  title = {UAV Trajectory and Multi-User Beamforming Optimization for Clustered Users Against Passive Eavesdropping Attacks With Unknown CSI},
  author = {Aly Sabri Abdalla and Ali Behfarnia and Vuk Marojevic},
  year = {2023},
  eprint = {2306.06686},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2306.06686v2},
}