@misc{indiciae4681d9f0a6ee,
  title = {Natural Systems.},
  author = {A L Foster},
  year = {1938},
  doi = {10.1073/pnas.24.4.185},
  url = {https://pubmed.ncbi.nlm.nih.gov/16588219/},
  note = {Source identifier: 16588219}
}