@article{mauno könönen1993longitudinal,
  title={A Longitudinal Study of Craniomandibular Disorders in Finnish Adolescents},
  author={mauno könönen,marjatta nystrom},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={7},
  number={4},
  pages={329--336},
  doi = {10.11607/jofph.07329},
  year={1993}
}