@article{silvi nordahl2003pain,
  title={Pressure Pain Threshold of the Posterior Aspect of the Temporomandibular Joint Measured with a Semi-Spherical Probe},
  author={silvi nordahl,sigvard kopp},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={17},
  number={2},
  pages={145--150},
  doi = {10.11607/jofph.17145},
  year={2003}
}