@BOOK
	{ NBKtcs06,
	  EDITOR = "G. Navarro and L. Bertossi and Y. Kohayakawa",
	  TITLE = "Proc. 4th IFIP International Conference on 
		   Theoretical Computer Science (TCS)",
	  PUBLISHER = "Springer",
	  ADDRESS = "Santiago, Chile",
	  MONTH = aug,
	  YEAR = 2006
	}