@misc{ongole2022dirac,
  title={Dirac observables in the 4-dimensional phase space of Ashtekar's variables and spherically symmetric loop quantum black holes},
  author={Geeth Ongole and Hongchao Zhang and Tao Zhu and Anzhong Wang and Bin Wang},
  year={2022},
  eprint={2208.10562},
  archivePrefix={arXiv},
  primaryClass={gr-qc},
  doi={10.3390/},
  url={https://arxiv.org/abs/2208.10562}
}