@book{991,
	author = {Aho, Alfred V. and Hopcroft, John E.,},
	title = {The design and analysis of computer algorithms /},
	publisher = {Addison-Wesley Pub. Co.,},
	year = {[1974]},
	series = {Addison-Wesley series in computer science and information processing},
	address = {Reading, Mass. :},
	note = {Includes index.}
}