1. Activity of the lips associated with simulated upper incisors position;Iwahashi;Orthod Waves,2004
2. The lip sealing function correlates with increased facial height;Nokita;Orthod Waves,2005
3. The influence of incompetent lip seal on the growth and development of craniofacial complex;Drevensek;Coll Antropol,2005
4. Oral myofunctional disorders;Barrett,1974
5. Reliability of soft-tissue profile in cephalometrics;Hillesund;Am J Orthod,1978