@InProceedings{	  rd99stacs,
  author	= "Robson, John Michael and Diekert, Volker",
  title		= "On Quadratic Word Equations",
  booktitle	= "Proc. 16th Annual Symposium on Theoretical Aspects of
		  Computer Science (STACS'99), Trier (Germany)",
  volume	= "1563",
  pages		= "217--226",
  editor	= "Ch. Meinel and S. Tison",
  series	= "Lecture Notes in Computer Science",
  publisher	= "Springer-Verlag",
  year		= "1999",
  doi		= "10.1007/3-540-49116-3_20"
}