@misc{indiciaeb3ed2844dea3,
  title = {On Products in a Complex.},
  author = {H Whitney},
  year = {1937},
  doi = {10.1073/pnas.23.5.285},
  url = {https://pubmed.ncbi.nlm.nih.gov/16577774/},
  note = {Source identifier: 16577774}
}