@misc{indiciaece4433c4fbf7,
  title = {Second invariant in an excited three-level system.},
  author = {HP Gottlieb},
  year = {1985},
  doi = {10.1103/physreva.32.653},
  url = {https://pubmed.ncbi.nlm.nih.gov/9896100/},
  note = {Source identifier: 9896100}
}