@book{960,
	author = {Lewis, Harry R. and Papadimitriou, Christos H.,},
	title = {Elements of the theory of computation /},
	publisher = {Prentice-Hall ;},
	year = {c1981.[Reprinted 2001]},
	series = {Prentice-Hall software series},
	address = {Englewood Cliffs, N.J. :}
}