@misc{indiciae56ee396491b4,
  title = {Is yawning a cholinergic response?},
  author = {R Urbá-Holmgren and R M González and B Holmgren},
  year = {1977},
  doi = {10.1038/267261a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/865617/},
  note = {Source identifier: 865617}
}