@misc{indiciae7df7b9e4edc0,
  title = {New window on Proterozoic life},
  author = {A H Knoll and N J Butterfield},
  year = {1989},
  doi = {10.1038/337602a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/11538342/},
  note = {Source identifier: 11538342}
}