1Proffit WR. Contemporary orthodontics. 2nd ed. St Louis, Mosby Co 1993;129-133.
2Solow B, Siersbaek-Nielsen S, Greve E. Airway adequacy, head posture and craniofacial morphology. Am J Orthod 1984; 86: 214-223.
3Linder-Aronson S. Adenoid: Their effect on mode of breathing and nasal airflow and their relationship to characteristics of the facial skeleton and the dentition. Acta Otolaryngol(Suppl) 1979; 265: 1-134.
4Vig PS, Spalding PM, Lints RR. Sensitivity and specificity of diagnostic tests for impaired nasal respiration. Am J Orthod Dentofacial Orthop 1991;99: 354-60.
5Warren DW, Hairfield WM, Seaton D. The relationship between nasal airway size and nasaloral breathing. Am J Orthod Dentofacial Orthop 1988; 93:289-93.
6Mcnamara JA. A method of cephalometric evaluation. Am J Orthod 1984;86: 449-69.
7O' Ryan FS, Gallagher DM, LaBanc JP, et al. The relation between nasorespiratory function and dentofacial morphology: A review. Am J Orthod 1982; 82: 403-10.
8Keall CL, Vig PS. An improvd technique for the measurement of nasal and oral respiration. Am J Orthod 1987; 91: 207-12.
9Warren DW, Hinton VA, Hairfield WM. Measurement of nasal and oral respiration using inductive plethysmography. Am J Orthod 1986; 89:480-84.
10Harvold EP, Tomer BS, Vargervik K, Chierici G. Primate experiments on oral respiration. Am J Orthod 1981; 79: 359-72.