@book{628,
	author = {Hoproft, John E. and Ullman, Jeffrey D.},
	title = {Introduction to automata theory, languages, and computation /},
	publisher = {Narosha,},
	year = {c1999.},
	address = {New Delhi:},
	edition = {Rep.},
	note = {Includes bibliography (p. 396-410) and index.}
}