1. 1) Rogers DF. Physiology of airway mucus secretion and pathophysiology of hypersecretion. Respiratory Care, 52, 1134–1146, discussion, 1146–1149 (2007).
2. 2) Gizurarson S. Anatomical and histological factors affecting intranasal drug and vaccine delivery. Curr. Drug Deliv., 9, 566–582 (2012).
3. 3) Halama AR, Decreton S, Bijloos JM, Clement PAR. Density of epithelial cells in the normal human nose and the paranasal sinus mucosal. A scanning electron microscopic study. Rhinology, 28, 25–32 (1990).
4. 4) Mygind N, Dahl R. Anatomy, physiology and function of the nasal cavities in health and disease. Adv. Drug Deliv. Rev., 29, 3–12 (1998).
5. 5) Purkinjeand JE, Valentin G. De phaenomeno generali et fundamentalis motus vibratorii continui in membranis cum externis tum internis animalum plurimorum et superiorum et inferiorum ordinum obvii., Wratislaviae, Amsterdam (1835).