@book{3549,
	author = {Hopcroft, John E. and Motwani, Rajeev.},
	title = {Introduction to automata theory, languages, and computation /},
	publisher = {Pearson,},
	year = {c2009.},
	address = {New Delhi :},
	edition = {3rd ed.},
	note = {Includes  index.}
}