@misc{indiciae29868bd44ace,
  title = {Yawning: a possible confounding variable in EMG biofeedback studies.},
  author = {R E Oman and S J Sullivan and J Fleury and E Dutil},
  year = {1989},
  doi = {10.1007/bf00999125},
  url = {https://pubmed.ncbi.nlm.nih.gov/2631974/},
  note = {Source identifier: 2631974}
}