@misc{indiciae4e510f54c862,
  title = {Esophageal motion during breathing.},
  author = {D Trop and A Baert and K P van de Woestijne},
  year = {1967},
  doi = {10.3109/13813456709084921},
  url = {https://pubmed.ncbi.nlm.nih.gov/4168932/},
  note = {Source identifier: 4168932}
}