Salman, Suzan A. 2015. “Measurement of Salivary Immunoglobulin A of Participants With a Healthy, Gingivitis and Chronic Periodontitis Conditions”. Journal of Baghdad College of Dentistry 27 (3): 120-23. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/817.