@InProceedings{masumura-EtAl:2015:EMNLP,
  author    = {Masumura, Ryo  and  Asami, Taichi  and  Oba, Takanobu  and  Masataki, Hirokazu  and  Sakauchi, Sumitaka  and  Ito, Akinori},
  title     = {Hierarchical Latent Words Language Models for Robust Modeling to Out-Of Domain Tasks},
  booktitle = {Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing},
  month     = {September},
  year      = {2015},
  address   = {Lisbon, Portugal},
  publisher = {Association for Computational Linguistics},
  pages     = {1896--1901},
  url       = {https://aclweb.org/anthology/D/D15/D15-1217}
}