@misc{indiciaec5b1caf16f8e,
  title = {Another look at pneumoperitoneum.},
  author = {B Felson and J F Wiot},
  year = {1973},
  doi = {10.1016/0037-198x(73)90113-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4751076/},
  note = {Source identifier: 4751076}
}