@misc{indiciaed23cccf38c32,
  title = {SUR LES GROUPES D'EILENBERG-MAC LANE. II.},
  author = {H Cartan},
  year = {1954},
  doi = {10.1073/pnas.40.8.704},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589542/},
  note = {Source identifier: 16589542}
}