@ARTICLE{6881706,
  author={Wu, Dingming and Choi, Byron and Xu, Jianliang and Jensen, Christian S.},
  journal={IEEE Transactions on Knowledge and Data Engineering}, 
  title={Authentication of Moving Top-k Spatial Keyword Queries}, 
  year={2015},
  volume={27},
  number={4},
  pages={922-935},
  doi={10.1109/TKDE.2014.2350252}}