@InProceedings{simion-collins-stein:2013:EMNLP,
  author    = {Simion, Andrei  and  Collins, Michael  and  Stein, Cliff},
  title     = {A Convex Alternative to {IBM} Model 2},
  booktitle = {Proceedings of the 2013 Conference on Empirical Methods in Natural Language Processing},
  month     = {October},
  year      = {2013},
  address   = {Seattle, Washington, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {1574--1583},
  url       = {http://www.aclweb.org/anthology/D13-1164}
}