@article{knowledgegraphreasoningwithrelational,
  title = {Knowledge Graph Reasoning with Relational Digraph},
  author = {Yongqi Zhang and Quanming Yao},
  year = {2021},
  eprint = {2108.06040},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2108.06040v2},
}