@misc{indiciaee2446a109643,
  title = {Chronic tension headache--treated with amitriptyline--a double-blind study.},
  author = {S Diamond and B J Baltes},
  year = {1971},
  doi = {10.1111/j.1526-4610.1971.hed1103110.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4940167/},
  note = {Source identifier: 4940167}
}