@misc{indiciae03e6e67457e5,
  title = {Epochal trace elements and evolution.},
  author = {C C Pfeiffer and E R Braverman},
  year = {1982},
  doi = {10.1007/bf01965412},
  url = {https://pubmed.ncbi.nlm.nih.gov/7136960/},
  note = {Source identifier: 7136960}
}