@book{213188,
	author = {Sipser, Michael.},
	title = {Introduction to the theory of computation E-Book},
	publisher = {Thomson Course Technology,},
	year = {c2006.},
	address = {Boston :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1103/2006271030-b.html}
}