@misc{indiciae93c3cce685f3,
  title = {Indefinite intertwining operators.},
  author = {M W Baldoni-Silva and A W Knapp},
  year = {1984},
  doi = {10.1073/pnas.81.4.1272},
  url = {https://pubmed.ncbi.nlm.nih.gov/16593424/},
  note = {Source identifier: 16593424}
}