- [1]
J. D. Bekenstein, Phys. Rev. D, 7: 2333-2346 (1973)
- [2]
S. W. Hawking, Nature, 248: 30-31 (1974)
- [3]
S. Carlip, Lect. Notes Phys, 769: 89-123 (2009)
- [4]
R. M. Wald, Phys. Rev. D, 48: 3427-3431 (1993)
- [5]
V. Iyer and R. M. Wald, Phys. Rev. D, 50: 846-864 (1994)
- [6]
T. Jacobson, G. Kang, and R. C. Myers, Phys. Rev. D, 49: 6587-6598 (1994)
- [7]
D. Lovelock, J. Math. Phys., 12: 498-501 (1971)
- [8]
X. O. Camanho and J. D. Edelstein, Class. Quant. Grav., 30: 035009 (2013)
- [9]
N. Bodendorfer and Y. Neiman, Phys. Rev. D, 90: 084054 (2014)
- [10]
C. Rovelli, Quantum Gravity (Cambridge Monographs on Mathematical Physics. Cambridge University Press, 2004)
- [11]
T. Thiemann, Modern Canonical Quantum General Relativity (ewblock Cambridge Monographs on Mathematical Physics. Cambridge University Press, 2008)
- [12]
A. Ashtekar and J. Lewandowski, Class. Quant. Grav., 21: R53 (2004)
- [13]
M. Han, W. Huang, and Y. Ma, Int. J. Mod. Phys. D, 16: 1397-1474 (2007)
- [14]
J. Wang, Y. Ma, and X.-A. Zhao, Phys. Rev. D, 89: 084065 (2014)
- [15]
J. Wang and C.-G. Huang, Class. Quant. Grav., 32: 035026 (2015)
- [16]
A. Ashtekar, C. Beetle, and S. Fairhurst, Class. Quant. Grav., 16: L1-L7 (1999)
- [17]
A. Ashtekar, S. Fairhurst, and B. Krishnan, Phys. Rev. D, 62: 104025 (2000)
- [18]
A. Ashtekar, J. C. Baez, A. Corichi, and K. Krasnov, Phys. Rev. Lett., 80: 904-907 (1998)
- [19]
A. Ashtekar, J. C. Baez, and K. Krasnov, Adv. Theor. Math. Phys., 4: 1-94 (2000)
- [20]
T. Liko and I. Booth, Class. Quant.Grav., 24: 3769-3782 (2007)
- [21]
X.-N. Wu, C.-G. Huang, and J.-R. Sun, Phys. Rev. D, 77: 124023 (2008)
- [22]
T. Jacobson and R. C. Myers, Phys. Rev. Lett., 70: 3684-3687 (1993)
- [23]
G. F. Barbero, J. Lewandowski, and E. Villasenor, Phys. Rev. D, 80: 044016 (2009)