@InProceedings{	  DiekertKM09,
  author	= "Volker Diekert and Steffen Kopecki and Victor Mitrana",
  title		= "On the Hairpin Completion of Regular Languages",
  booktitle	= "Theoretical Aspects of Computing - ICTAC 2009",
  year		= "2009",
  pages		= "170--184",
  publisher	= "Springer",
  series	= "Lecture Notes in Computer Science",
  volume	= "5684",
  crossref	= "DBLPictac2009",
  bibsource	= "DBLP, http://dblp.uni-trier.de",
  doi		= "10.1007/978-3-642-03466-4_11"
}