@techreport{5600,
  title = "On the final coalgebra of automatic sequences",
  author = "Clemens Kupke and Jan Rutten",
  year = "2011",
  institution = "CWI Amsterdam",
  number = "SEN-1112",
  pages = "1-14",
  url = "http://oai.cwi.nl/oai/asset/18604/18604D.pdf",
}