H. . . J. Talib and M. . . A. Ahmed, “Assessment of Salivary α-amylase and Flow Rate Levels and Their Correlation with Gingivitis and Severity of Chronic Periodontitis (Part: 1)”, J Bagh Coll Dent, vol. 28, no. 4, pp. 115–121, Dec. 2016, doi: 10.12816/0033221.