@misc{indiciaebb12009c03ff,
  title = {Vitamin D2 in vertebrate evolution.},
  author = {A W Hay and G Watson},
  year = {1977},
  doi = {10.1016/0305-0491(77)90234-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/318540/},
  note = {Source identifier: 318540}
}