@InProceedings{skrzypczak:LIPIcs.ICALP.2018.140,
  author =	{Skrzypczak, Michal},
  title =	{{Unambiguous Languages Exhaust the Index Hierarchy}},
  booktitle =	{45th International Colloquium on Automata, Languages, and Programming (ICALP 2018)},
  pages =	{140:1--140:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-076-7},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{107},
  editor =	{Chatzigiannakis, Ioannis and Kaklamanis, Christos and Marx, D\'{a}niel and Sannella, Donald},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICALP.2018.140},
  URN =		{urn:nbn:de:0030-drops-91442},
  doi =		{10.4230/LIPIcs.ICALP.2018.140},
  annote =	{Keywords: unambiguous automata, parity games, infinite trees, index hierarchy}
}