@inproceedings{preferencegrammarsandsoftsyntactic,
  title = {Preference Grammars and Soft Syntactic Constraints for GHKM Syntax-based Statistical Machine Translation},
  author = {Matthias Huck and Hieu Hoang and Philipp Koehn},
  year = {2014},
  booktitle = {WS 2014 10},
  url = {https://aclanthology.org/W14-4018},
}