@misc{liu2021heterogeneous,
  title={Heterogeneous Graph Neural Networks for Large-Scale Bid Keyword Matching},
  author={Zongtao Liu and Bin Ma and Quan Liu and Jian Xu and Bo Zheng},
  year={2021},
  eprint={2111.00926},
  archivePrefix={arXiv},
  primaryClass={cs.IR},
  doi={10.1145/3459637.3481926},
  url={https://arxiv.org/abs/2111.00926}
}