@ARTICLE{4912201,
  author={Bramandia, Ramadhana and Choi, Byron and Ng, Wee Keong},
  journal={IEEE Transactions on Knowledge and Data Engineering}, 
  title={Incremental Maintenance of 2-Hop Labeling of Large Graphs}, 
  year={2010},
  volume={22},
  number={5},
  pages={682-698},
  doi={10.1109/TKDE.2009.117}}