@ARTICLE{8917697,
  author={Jiang, Jiaxin and Choi, Byron and Xu, Jianliang and Bhowmick, Sourav S},
  journal={IEEE Transactions on Knowledge and Data Engineering}, 
  title={A Generic Ontology Framework for Indexing Keyword Search on Massive Graphs}, 
  year={2021},
  volume={33},
  number={6},
  pages={2322-2336},
  doi={10.1109/TKDE.2019.2956535}}