@misc{indiciae406a63fa60f0,
  title = {Pope John XXI.},
  author = {R A Kyle and M A Shampo},
  year = {1980},
  doi = {10.1001/jama.243.10.1078},
  url = {https://pubmed.ncbi.nlm.nih.gov/6986482/},
  note = {Source identifier: 6986482}
}