@inproceedings{HH16,
  title = "Tightening the Complexity of Equivalence Problems for Commutative Grammars",
  author = "Christoph Haase and Piotr Hofman",
  year = "2016",
  booktitle = "Symposium on Theoretical Aspects of Computer Science, {STACS}",
  pages = "41:1--41:14",
  publisher = "Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik",
  series = "LIPIcs",
  volume = "47",
  doi = "10.4230/LIPIcs.STACS.2016.41",
}