@misc{indiciae79cb22b2188e,
  title = {Pin groups in physics.},
  author = {C DeWitt-Morette and BS DeWitt},
  year = {1990},
  doi = {10.1103/physrevd.41.1901},
  url = {https://pubmed.ncbi.nlm.nih.gov/10012562/},
  note = {Source identifier: 10012562}
}