@article{yrsa le bell1993symptoms,
  title={Self-Reported Symptoms of Stress in Finnish Patients With Craniomandibular Disorders},
  author={paivi niemi,yrsa le bell,leena koskinen-moffetl},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={7},
  number={4},
  pages={354--358},
  doi = {10.11607/jofph.07354},
  year={1993}
}