@misc{indiciae9da55547445a,
  title = {When can identical particles collide?},
  author = {M Bourdeau and RD Sorkin},
  year = {1992},
  doi = {10.1103/physrevd.45.687},
  url = {https://pubmed.ncbi.nlm.nih.gov/10014422/},
  note = {Source identifier: 10014422}
}