Mouthbreathing, lip seal and upper lip coverage and their relationship with gingival inflammation in 11-14 years old schoolchildren. J Clin Periodontol 1991;18:698-702.
Handbook of orthodontics for the student and general practitioner (3rd ed). Chicago, London, Boca Raton: Year Book Medical Publishers; 1963.
Prevalence and factors related to mouth breathing in school children at the Santo Amaro project-Recife, 2005. Braz J Otorhinolaryngol 2006 May-Jun;72(3):394-99.
Avaliaçãoradiográfica da adenóideemcrianças: Métodos de mensuração e parâmetros da normalidade. Radiol Bras 2004;37:445-48.
Comparison between radiological and nasopharyngolaryngoscopic assessment of adenoid tissue volume in mouth breathing children. Rev Bras Otorrinolaringol 2005;71(1):23-27.
Pediatric dentistry–infancy through adolescence (4th ed). Elsevier Saunders 2010:437.