@misc{indiciae98684cf0b7b5,
  title = {[Einstein's four dimensional spaces].},
  author = {H GUGGENHEIMER},
  year = {1952},
  doi = {10.1007/bf02296683},
  url = {https://pubmed.ncbi.nlm.nih.gov/13033884/},
  note = {Source identifier: 13033884}
}