@misc{indiciae47136a082044,
  title = {An invariant for certain operator algebras.},
  author = {R W Carey and J D Pincus},
  year = {1974},
  doi = {10.1073/pnas.71.5.1952},
  url = {https://pubmed.ncbi.nlm.nih.gov/16592156/},
  note = {Source identifier: 16592156}
}