@article{marcelo kreiner1999of,
  title={Toothache of Cardiac Origin},
  author={marcelo kreiner,jeffrey p. okeson},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={13},
  number={3},
  pages={201--207},
  doi = {10.11607/jofph.13201},
  year={1999}
}