@misc{indiciae21f6be6cd696,
  title = {How to build a time machine.},
  author = {Paul Davies},
  year = {2002},
  doi = {10.1038/scientificamerican0902-50},
  url = {https://pubmed.ncbi.nlm.nih.gov/12197102/},
  note = {Source identifier: 12197102}
}