@InProceedings{mestel:LIPIcs.FSTTCS.2019.49,
  author =	{Mestel, David},
  title =	{{Widths of Regular and Context-Free Languages}},
  booktitle =	{39th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2019)},
  pages =	{49:1--49:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-131-3},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{150},
  editor =	{Chattopadhyay, Arkadev and Gastin, Paul},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2019.49},
  URN =		{urn:nbn:de:0030-drops-116111},
  doi =		{10.4230/LIPIcs.FSTTCS.2019.49},
  annote =	{Keywords: Formal languages, combinatorics on words, information flow}
}