@misc{indiciae34b173f87717,
  title = {Peripherally administered reduced pterins do enter the brain.},
  author = {G Kapatos and S Kaufman},
  year = {1981},
  doi = {10.1126/science.7233193},
  url = {https://pubmed.ncbi.nlm.nih.gov/7233193/},
  note = {Source identifier: 7233193}
}