@InProceedings{haase_et_al:LIPIcs.STACS.2016.41,
  author =	{Haase, Christoph and Hofman, Piotr},
  title =	{{Tightening the Complexity of Equivalence Problems for Commutative Grammars}},
  booktitle =	{33rd Symposium on Theoretical Aspects of Computer Science (STACS 2016)},
  pages =	{41:1--41:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-001-9},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{47},
  editor =	{Ollinger, Nicolas and Vollmer, Heribert},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.STACS.2016.41},
  URN =		{urn:nbn:de:0030-drops-57422},
  doi =		{10.4230/LIPIcs.STACS.2016.41},
  annote =	{Keywords: language equivalence, commutative grammars, presburger arithmetic, semi-linear sets, petri nets}
}