@misc{indiciaeb16043cf2485,
  title = {On Certain Sequences of Functions.},
  author = {D G Bourgin},
  year = {1946},
  doi = {10.1073/pnas.32.1.1},
  url = {https://pubmed.ncbi.nlm.nih.gov/16578182/},
  note = {Source identifier: 16578182}
}