@misc{indiciaebad0cdcc1bf1,
  title = {Link homotopy.},
  author = {U Koschorke},
  year = {1991},
  doi = {10.1073/pnas.88.1.268},
  url = {https://pubmed.ncbi.nlm.nih.gov/11607145/},
  note = {Source identifier: 11607145}
}