@misc{indiciae6388da62ccbb,
  title = {Geodesic round trips by parallel transport in quantum gravity.},
  author = {G Modanese},
  year = {1993},
  doi = {10.1103/physrevd.47.502},
  url = {https://pubmed.ncbi.nlm.nih.gov/10015605/},
  note = {Source identifier: 10015605}
}