@misc{indiciaed19d9a486766,
  title = {What's below the surface?},
  author = {R E Frisch},
  year = {1981},
  doi = {10.1056/nejm198110223051717},
  url = {https://pubmed.ncbi.nlm.nih.gov/7278917/},
  note = {Source identifier: 7278917}
}