@misc{indiciaeafa672e9004c,
  title = {Path-integral and operator formalism in quantum gravity.},
  author = {H Arisue and T Fujiwara and M Kato and K Ogawa},
  year = {1987},
  doi = {10.1103/physrevd.35.2309},
  url = {https://pubmed.ncbi.nlm.nih.gov/9957930/},
  note = {Source identifier: 9957930}
}