@InProceedings{li-EtAl:2015:ACL-IJCNLP3,
  author    = {Li, Zhenghua  and  Chao, Jiayuan  and  Zhang, Min  and  Chen, Wenliang},
  title     = {Coupled Sequence Labeling on Heterogeneous Annotations: POS Tagging as a Case Study},
  booktitle = {Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 1: Long Papers)},
  month     = {July},
  year      = {2015},
  address   = {Beijing, China},
  publisher = {Association for Computational Linguistics},
  pages     = {1783--1792},
  url       = {http://www.aclweb.org/anthology/P15-1172}
}