@article{hierarchicaltransformernetworksfor,
  title = {Three-level Hierarchical Transformer Networks for Long-sequence and Multiple Clinical Documents Classification},
  author = {Yuqi Si and Kirk Roberts},
  year = {2021},
  eprint = {2104.08444},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2104.08444v2},
}