1. Etzel K. Role of salivary glands in nutrition. In: Dobrosielski-Vergona K, editor. Biology of the salivary glands. Boca Raton: CRC Press, Inc; 1993. p. 129–52.
2. Holsinger CF, Bui DT. Anatomy, function, and evaluation of the salivary glands. In: Myers EN, Ferris RL, editors. Salivary gland disorders. Berlin/Heidelberg: Springer; 2007. p. 1–16.
3. Edgar WM. Saliva and dental health: clinical implications of saliva: report of a consensus meeting. Br Dent J. 1990;169(3–4):96–8.
4. Fox PC, van der Ven PF, Sonies BC, Weiffenbach JM, Baum BJ. Xerostomia: evaluation of a symptom with increasing significance. JADA. 1985;110:519–25.
5. Bardow A, Lagerlof F, Nauntofte B, Tenovuo J. The role of saliva. In: Fejerskov O, Kidd E, editors. Dental caries: the disease and its clinical management. 2nd ed. Singapore: Wiley; 2008. p. 190–207.