@book{36608,
	author = {Cheng, Ta-Pei.},
	title = {Relativity, gravitation and cosmology},
	publisher = {Oxford University Press,},
	year = {2010.},
	series = {Oxford master series in particle physics, astrophysics and cosmology},
	address = {Oxford :},
	edition = {2nd ed.},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780199573639.001.0001}
}