Lura, H.E.: Die Enzyme des Speichels und der Zahne, Zahnheilkunde in Einzeldarstllungen, Munchen, 1948, Carl Hauser Verlag, p. 61.
2.
Dentay, J.T. , and Rae, J.J.: Phosphatase in Saliva, J. D. Res. 28: 68, 1949.
3.
Fitzgerald, R.J.: Preliminary Studies on the Presence of Acid Phosphatase in Certain Oral Microorganisms, J. D. Res . 31: 189, 1952.
4.
Helman, E.Z. , and Mitchell, D.F.: Phosphatase in Human Saliva: Its Relationship to Calculus and Lactobacillus Counts, J. D. Res. 33: 335, 1954.
5.
Shinowara, G.Y. , Jones, L.M., and Reinhart , H.L.: The Estimation of Serum Inorganic Phosphate and Acid and Alkaline Phosphatase Activity, J. Biol. Chem. 26: 203, 1947.
6.
Fiske, C.H., and Subbarow, Y.: The Colorimetric Determination of Phosphorus, J. Biol. Chem . 66: 375, 1925.
7.
Lura, H.E.: Investigations on the Salivary Phosphates and Phosphatases, J. D. Res. 26: 203, 1947.