@Article{	  DiekertM12_SI_DLT11,
  author	= "Volker Diekert and Alexei G. Myasnikov",
  title		= "Group Extensions over Infinite Words",
  journal	= "International Journal of Foundations of Computer Science",
  volume	= "23",
  pages		= "1001-1019",
  year		= "2012",
  note		= "Special Issue DLT 2011"
}