@article{per alstergren2003oral,
  title={Acute Oral Pain Intensity and Pain Threshold Assessed by Intensity Matching to Pain Induced by Electrical Stimuli},
  author={per alstergren,jonathan förström},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={17},
  number={2},
  pages={151--159},
  doi = {10.11607/jofph.17151},
  year={2003}
}