@article{shao2016scalable,
  title={Scalable Nearest Neighbor Sparse Graph Approximation by Exploiting Graph Structure},
  author={Shao, Ming and Wu, Xindong and Fu, Yun},
  journal={IEEE Transactions on Big Data},
  volume={2},
  number={4},
  pages={365--380},
  year={2016},
  publisher={IEEE}
}