@InProceedings{	  HromkovicPS09tcs,
  author	= "Juraj Hromkovi\u{c} and Holger Petersen and Georg
		  Schnitger",
  title		= "On the limits of the communication complexity technique
		  for proving lower bounds on the size of minimal {NFA}'s",
  journal	= "Theoretical Computer Science",
  volume	= "410",
  number	= "30-32",
  year		= "2009",
  pages		= "2972--2981",
  issn		= "0304-3975",
  doi		= "10.1016/j.tcs.2009.03.020"
}