@misc{indiciae6328071cb776,
  title = {Time in semiclassical gravity.},
  author = {R Brout and G Venturi},
  year = {1989},
  doi = {10.1103/physrevd.39.2436},
  url = {https://pubmed.ncbi.nlm.nih.gov/9959931/},
  note = {Source identifier: 9959931}
}