1. Kerr, A.C.: The Physiological Regulation of Salivary Secretions in Man, New York: Pergamon Press, 1961, pp 50-60.
2. Human Saliva
3. SHANNON, I.L.: Sodium and Potassium Levels of Human Whole Stimulated Saliva Collected at a Low Rate of Flow from Subjects in a Select Age Grouping, Air Force School of Aviation Medicine, 1-12 report, No. 57-80, June, 1957.
4. DEMETRIOU, N.: Contribution in the Study Concerning Rate of Flow, Sodium and Potassium Concentration of Human Mixed "Resting" and Stimulated Saliva, thesis, Dental School, University of Athens, Greece, 1966.