@misc{indiciaef48ac3a6a5db,
  title = {A simple method of relaxation.},
  author = {N J Yorkston and H G Sergeant},
  year = {1969},
  doi = {10.1016/s0140-6736(69)90861-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4188090/},
  note = {Source identifier: 4188090}
}