@misc{indiciae8dd56f368f1b,
  title = {Feynman path integral and the photon.},
  author = {RE Pugh},
  year = {1986},
  doi = {10.1103/physrevd.33.1033},
  url = {https://pubmed.ncbi.nlm.nih.gov/9956723/},
  note = {Source identifier: 9956723}
}