@InProceedings{	  dlm06,
  author	= "Volker Diekert and Markus Lohrey and Alexander Miller",
  title		= "Partially commutative inverse monoids",
  booktitle	= "Proceedings of the 31th International Symposium on
		  Mathematical Foundations of Computer Science (MFCS 2006),
		  Bratislave (Slovakia)",
  editor	= "Rastislav Kralovic and Pawe\l{} Urzyczyn",
  series	= "Lecture Notes in Computer Science",
  volume	= "4162",
  publisher	= "Springer-Verlag",
  pages		= "292--304",
  year		= "2006",
  doi		= "10.1007/11821069_26"
}