• [1]

    H. M. Haggard and C. Rovelli, Phys. Rev. D 92, 104020 (2015)

  • [2]

    S. A. Hayward, Phys. Rev. Lett. 96, 031103 (2006)

  • [3]

    A. Barrau, C. Rovelli, and F. Vidotto, Phys. Rev. D 90, 127503 (2014)

  • [4]

    J. Lewandowski, Y. Ma, J. Yang et al., Phys. Rev. Lett. 130, 101501 (2023)

  • [5]

    M. Han, C. Rovelli, and F. Soltani, Phys. Rev. D 107, 064011 (2023)

  • [6]

    C. Lan, H. Yang, Y. Guo et al., Int. J. Theor. Phys. 62, 202 (2023), arXiv: 2303.11696

  • [7]

    C. Zhang, Y. Ma, and J. Yang, Phys. Rev. D 108, 104004 (2023)

  • [8]

    S. Chandrasekhar, The Mathematical Theory of Black Holes (Oxford University Press, 1998), ISBN 9780198503705 https://doi.org/10.1093/oso/9780198503705.001.0001

  • [9]

    Y. Gong, Z. Cao, H. Gao et al., Mon. Not. R. Astron. Soc. 488, 2722 (2019), arXiv: 1907.05239

  • [10]

    Y. Gong, Z. Cao, and X. Chen, Phys. Rev. D 103, 124044 (2021)

  • [11]

    L.-M. Cao, L.-Y. Li, X.-Y. Liu et al., arXiv: 2312.04301

  • [12]

    S. E. Gralla, D. E. Holz, and R. M. Wald, Phys. Rev. D 100, 024018 (2019)

  • [13]

    K. Akiyama et al. (T. E. H. T. Collaboration), Astrophys. J. Lett. 875, L1 (2019)

  • [14]

    R.-S. Lu, K. Asada, T. P. Krichbaum et al., Nature 616, 686 (2023)

  • [15]

    K. Akiyama et al. (E. H. T. Collaboration), Astrophys. J. Lett. 930, L12 (2022)