@Article{	  DiekertKufleitner14tocs,
  author	= "Volker Diekert and Manfred Kufleitner",
  title		= "Omega-rational expressions with Bounded Synchronization
		  Delay",
  publisher	= "Springer-Verlag",
  journal	= "Theory of Computing Systems",
  volume	= "56",
  pages		= "686--696",
  year		= "2015",
  doi		= "10.1007/s00224-013-9526-4"
}