@misc{indiciaea1988508677b,
  title = {Complex Fiber Bundles.},
  author = {N S Hawley},
  year = {1952},
  doi = {10.1073/pnas.38.5.411},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589113/},
  note = {Source identifier: 16589113}
}