@InCollection{	  Lohrey99mfcs,
  title		= "Complexity Results for Confluence Problems",
  year		= "1999",
  volume	= "1672",
  pages		= "114--124",
  publisher	= "Springer",
  address	= "Berlin",
  series	= "Lecture Notes in Computer Science",
  booktitle	= "Mathematical foundations of computer science 1999
		  ({S}zklarska {P}oreba)",
  doi		= "10.1007/3-540-48340-3_11",
  author	= "Lohrey, Markus"
}