@misc{indiciae8cfde1fbe021,
  title = {[Pneumoperitoneum and nitrous oxide].},
  author = {H Gehring and P Schmucker},
  year = {1997},
  doi = {10.1007/s001010050484},
  url = {https://pubmed.ncbi.nlm.nih.gov/9424973/},
  note = {Source identifier: 9424973}
}