@conference{177,
  author = {Martin Berglund and H. Björklund and F. Drewes},
  title = {Single-rooted DAGs in regular DAG languages: Parikh image and path languages},
  abstract = {No Abstract},
  year = {2017},
  journal = {International Workshop on Tree Adjoining Grammars and Related Formalisms},
  chapter = {94-101},
  month = {04/09-06/09},
  publisher = {The Association for Computational Linguistics (ACL)},
  isbn = {978-1-945626-98-2},
  url = {http://www.aclweb.org/anthology/W/W17/W17-62.pdf},
}