@inProceedings{naacl2019chen,
  author    = {Chen, Wenhu and Su, Yu and Shen, Yilin and Chen, Zhiyu  and Yan, Xifeng and Wang, William Yang},
  title	    = {How Large A Vocabulary Does Text Classification Need? A Variational Approach on Vocabulary Selection},
  booktitle = {Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies},
  year	    = {2019},
  address   = {Minneapolis, MN, USA},
  publisher = {ACL}
}