@InProceedings{schluter:2015:*SEM2015,
  author    = {Schluter, Natalie},
  title     = {The complexity of finding the maximum spanning DAG and other restrictions for DAG parsing of natural language},
  booktitle = {Proceedings of the Fourth Joint Conference on Lexical and Computational Semantics},
  month     = {June},
  year      = {2015},
  address   = {Denver, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {259--268},
  url       = {http://www.aclweb.org/anthology/S15-1031}
}