@article{fromcharacterstowordshierarchicalpre,
  title = {From Characters to Words: Hierarchical Pre-trained Language Model for Open-vocabulary Language Understanding},
  author = {Li Sun and Florian Luisier and Kayhan Batmanghelich and Dinei Florencio and Cha Zhang},
  year = {2023},
  eprint = {2305.14571},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2305.14571v2},
}