@InProceedings{	  DiMy11,
  author	= "Diekert, V. and Myasnikov, A.",
  title		= "Group extensions over infinite words",
  booktitle	= "Developments in Language Theory, 15th International
		  Conference, {DLT} 2011, Milan, Italy, July 19-22, 2011.
		  Proceedings",
  publisher	= "Springer",
  year		= "2011",
  volume	= "6795",
  editor	= "Giancarlo Mauri and Alberto Leporati",
  isbn		= "",
  pages		= "192--203",
  series	= "Lecture Notes in Computer Science"
}