@article{beyondwordbasedlanguagemodelin,
  title = {Beyond Word-based Language Model in Statistical Machine Translation},
  author = {Jiajun Zhang and Shujie Liu and Mu Li and Ming Zhou and Cheng-qing Zong},
  year = {2015},
  eprint = {1502.01446},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1502.01446v1},
}