@InProceedings{simion-collins-stein:2015:EMNLP,
  author    = {Simion, Andrei  and  Collins, Michael  and  Stein, Cliff},
  title     = {On A Strictly Convex IBM Model 1},
  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     = {221--226},
  url       = {https://aclweb.org/anthology/D/D15/D15-1023}
}