@misc{indiciae7ac19180c86a,
  title = {Interacting quantum fields and the chronometric principle.},
  author = {I E Segal},
  year = {1976},
  doi = {10.1073/pnas.73.10.3355},
  url = {https://pubmed.ncbi.nlm.nih.gov/16592353/},
  note = {Source identifier: 16592353}
}