Talib, Haider J., and Maha A. Ahmed. “Assessment of Salivary α-Amylase and Flow Rate Levels and Their Correlation With Gingivitis and Severity of Chronic Periodontitis (Part: 1)”. Journal of Baghdad College of Dentistry, vol. 28, no. 4, Dec. 2016, pp. 115-21, https://doi.org/10.12816/0033221.