@misc{indiciae1048560b6d20,
  title = {Letter: C3 standards.},
  author = {J Perrin},
  year = {1975},
  doi = {10.1016/s0140-6736(75)93169-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/48801/},
  note = {Source identifier: 48801}
}