@inproceedings{ijcai2009p208,
  title     = {Latent Variable Perceptron Algorithm for Structured Classification},
  author    = {Sun, Xu and Matsuzaki, Takuya and Okanohara, Daisuke and Tsujii, Jun'ichi},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {1236--1241},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/208},
}