参考文献：

[1] R.Schoen, S.T.Yau , "On the Proof of the Positive Mass Conjecture in General Relativity", Commun.Math.Phys.65,45-76(1979).

[2] E.Wittem,”A New Proof of the Positive Energy Theorem”,Commun,Math,Phys.80,381-402(1981).

[3] Penrose,”Naked Singularities”, Ann.New York Acad. Sci.224,125-134(1973).

[4] Felix Finster, Joel Smoller, Shing-Tung Yau, Some recent progress in classical general relativity, J. Math. Phys. 41, 3943 (2000); Marc Mars,  An overview on the Penrose inequality, Journal of Physics: Conference Series 66 (2007) 012004.

[5] G.Huisken, T.Illmanen, “The Riemannain Penrose Inequality”,Int.Math.Res.Not.20 1045-1058,(1997) and also on the web at

http://www.math.nwu.edu./~ilmanen.

[6]H.Bray, “ Proof of the Riemannian Penrose Conjecture Using the Positive Mass Theorem” Arxiv preprint math/9911173 (1999).

[7] Ishai Ben-Dov, Penrose inequality and apparent horizons, Phys. Rev. D 70, 124031 (2004).