@misc{indiciae096c48e3f00d,
  title = {Phonon representations.},
  author = {J Schwinger},
  year = {1990},
  doi = {10.1073/pnas.87.18.6983},
  url = {https://pubmed.ncbi.nlm.nih.gov/11607101/},
  note = {Source identifier: 11607101}
}