3Miller M J, Martin RJ, Carlo WA, et al. Oral breathing in newbom infanls. J Pediatr, 1985, 107:465-9.
4De Almeida V, Alvaro R, Al- Alaiyan S, et al. Prevalence and charcaterization of spontaneous oral breathing in pretenn infanis. Anm J Perinatol, 1995,12:185 - 8.
5Solow B, Peitersen B. Nasal airway resistance in the newborn.Rhinolgy, 1991,29:27 - 33.
6Nose Y, Mukai S, Nitta M. Chances in the shape of choanal openings and airflow rates during development. Nippon Jibbiinkoka Gakai Kaiho, 2000, 103:188 -92.
7Laine - Alaxa MT, Minkkinen UK. Variation of nasal respiratory pattem with age during growth and development. laryngoscope, 1997,107:386 - 9.
8Carlo WA, Martin RJ, Bruce EN, et al.Alae nasi aetivation (naasal flaring )decreases nasal resistance in prelerm infants.Pediatrics, 1983,72: 338 - 43.
9Fox GP,Mathews TG, The nasal cycle in infants.Ir Med J,1991, 84:24-5.
10Ohki M, Naito K, Cole P. Dimensions and resistances of the human nose: racial differences.Laryngoscpe, 1991,101: 276-8.
