@book{30256,
	author = {Stephani, Hans. and Kramer, Dietrich.},
	title = {Exact solutions of einstein's field equations /},
	publisher = {Cambridge University Press,},
	year = {2003.},
	series = {Cambridge monographs on mathematical physics.},
	address = {[S.l.] :},
	edition = {2nd ed.}
}