1. Arnowitt, R.L., Deser, S., Misner, C.W.: In: Witten, L. (ed.) The Dynamics of General Relativity, Gravitation: An Introduction to Current Research, Chap. 7, pp. 227–265. Wiley, New York (1962). arXiv:gr-qc/0405109
2. Bardeen, J.M., Carter, B., Hawking, S.W.: Commun. Math. Phys. 31, 161 (1973)
3. Bekenstein, J.D.: Phys. Rev. D 7, 2333 (1973)
4. Cai, R.G., Cao, L.M., Otha, N.: Phys. Rev. D 80, 024003 (2009a)
5. Cai, R.G., Cao, L.M., Otha, N.: Phys. Lett. B 679, 504 (2009b)