@misc{indiciaec3d4b65d2a08,
  title = {On the Connectivity Ring of a Bicompact Space (Second Note).},
  author = {J W Alexander},
  year = {1936},
  doi = {10.1073/pnas.22.6.381},
  url = {https://pubmed.ncbi.nlm.nih.gov/16588089/},
  note = {Source identifier: 16588089}
}