@misc{indiciaead22bf933987,
  title = {Retroversion as a routine gastroscopic maneuver.},
  author = {H C Singer and E J Reichbach and R R Fagin and S Kobayashi},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5546137/},
  note = {Source identifier: 5546137}
}