@misc{indiciae978d5e5bd283,
  title = {Countercurrent systems in animals.},
  author = {K Schmidt-Nielsen},
  year = {1981},
  doi = {10.1038/scientificamerican0581-118},
  url = {https://pubmed.ncbi.nlm.nih.gov/7233149/},
  note = {Source identifier: 7233149}
}