@InProceedings{chang-EtAl:2014:P14-1,
  author    = {Chang, Yin-Wen  and  Rush, Alexander M.  and  DeNero, John  and  Collins, Michael},
  title     = {A Constrained Viterbi Relaxation for Bidirectional Word Alignment},
  booktitle = {Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)},
  month     = {June},
  year      = {2014},
  address   = {Baltimore, Maryland},
  publisher = {Association for Computational Linguistics},
  pages     = {1481--1490},
  url       = {http://www.aclweb.org/anthology/P/P14/P14-1139}
}