@misc{indiciaec2d814d64633,
  title = {On Infinite Complexes with Automorphisms.},
  author = {B Eckmann},
  year = {1947},
  doi = {10.1073/pnas.33.12.372},
  url = {https://pubmed.ncbi.nlm.nih.gov/16588769/},
  note = {Source identifier: 16588769}
}