@InProceedings{czerwinski_et_al:LIPIcs.CONCUR.2020.36,
  author =	{Czerwi\'{n}ski, Wojciech and Figueira, Diego and Hofman, Piotr},
  title =	{{Universality Problem for Unambiguous VASS}},
  booktitle =	{31st International Conference on Concurrency Theory (CONCUR 2020)},
  pages =	{36:1--36:15},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-160-3},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{171},
  editor =	{Konnov, Igor and Kov\'{a}cs, Laura},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2020.36},
  URN =		{urn:nbn:de:0030-drops-128486},
  doi =		{10.4230/LIPIcs.CONCUR.2020.36},
  annote =	{Keywords: unambiguity, vector addition systems, universality problems}
}