@misc{indiciae8e0708a8f003,
  title = {Timelike duality.},
  author = {DL Welch},
  year = {1994},
  doi = {10.1103/physrevd.50.6404},
  url = {https://pubmed.ncbi.nlm.nih.gov/10017609/},
  note = {Source identifier: 10017609}
}