[1] Hawking S W 1975 Commun. Math. Phys. 43 199

[2] Kraus P and Wilczek F 1995 Nucl. Phys. B 433 403

[3] Parikh M K and Wilczek F 2000 Phys. Rev. Lett. 85 5042

[4] Parikh M K 2002 Phys. Lett. B 546 189

[5] Hemming S and Keski-Vakkuri E 2001 Phys. Rev. D 64
044006

[6] Medved A J 2002 Phys. Rev. D 66 124009

[7] Zhang J Y and Zhao Z 2005 Mod. Phys. Lett. A 20
1673

[8] Han Y W and Yang S Z 2005 Chin. Phys. Lett. 22 2769

[9] Han Y W 2005 Acta Phys. Sin. 54 5018 (in Chinese)

[10] Fang H Z, Hu Y P and Zhao Z 2005 Chin. Phys. Lett. 22
1611

[11] Zhang J Y and Zhao Z 2005 Phys. Lett. B 618 14

[12] Yang S Z 2005 Chin. Phys. Lett. 22 2492

[13] Yang S Z Jiang Q Q and Li H L 2005 Chin. Phys. 14 2411

[14] Zhang J Y and Zhao Z 2005 J. High Energy Phys. 10 055

[15] Zhang J Y and Zhao Z 2005 Nucl. Phys. B 725 173

[16] Yu H W 1994 Nucl. Phys. B 430 427

[17] Zhao Z 1999 Thermal Properties of the Black Hole and
Singlarity of Spacetime (Beijing: Beijing Normal University Press) (in
Chinese)

[18] Han Y W, Yang S Z and Liu W B 2005 Commun. Theor. Phys.
43 382

[19] Painlev\'e P and Hebd C R 1921 Comput. Rend. Acad. Sci.
(Paris) 173 677

[20] Landau L D and Lifshitz E M 1975 The Classical Theory of
Field (Oxford: Pergamon)

[21] Zhang H and Zhao Z 2001 J. Beijing Normal University
(Natural Science Edition) 37 471 (in Chinese)

[22] Massar S and Parentani R 2000 Nucl. Phys. B 575 333