@inproceedings{concavityandinitializationforunsupervise,
  title = {Concavity and Initialization for Unsupervised Dependency Parsing},
  author = {Kevin Gimpel and Noah A. Smith},
  year = {2012},
  booktitle = {NAACL 2012 6},
  url = {https://aclanthology.org/N12-1069},
}