@misc{indiciae31c5858d434c,
  title = {Molecular isomers in vision.},
  author = {R Hubbard and A Kropf},
  year = {1967},
  doi = {10.1038/scientificamerican0667-64},
  url = {https://pubmed.ncbi.nlm.nih.gov/6046324/},
  note = {Source identifier: 6046324}
}