@article{mario giannoni2004smile:,
  title={Gummy smile: clinical parameters useful for diagnosis and therapeutical approach},
  author={annalisa monaco,oriana streni,maria chiara marci,giuseppe marzo,roberto gatto,mario giannoni},
  journal={Journal of Clinical Pediatric Dentistry},
  volume={29},
  number={1},
  pages={19--26},
  doi = {10.17796/jcpd.29.1.y01l3r4m06q3k2x0},
  year={2004}
}