@misc{indiciaeb55de35d4910,
  title = {A projection perimeter.},
  author = {B S HYLKEMA},
  year = {1956},
  doi = {10.1159/000302968},
  url = {https://pubmed.ncbi.nlm.nih.gov/13388249/},
  note = {Source identifier: 13388249}
}