@misc{indiciae4184a9ec845a,
  title = {Surfer's knots.},
  author = {C O Burdick},
  year = {1981},
  doi = {10.1001/jama.1981.03310330013010},
  url = {https://pubmed.ncbi.nlm.nih.gov/7463673/},
  note = {Source identifier: 7463673}
}