S. . . M. Zaki, M. . . A. Ahmed, and H. . . M. Hameed, “Periodontal health status of patients with Maxillary Chronic Rhinosinusitis (Part 1: Clinical study)”, J Bagh Coll Dent, vol. 30, no. 2, pp. 59–65, Jun. 2018, doi: 10.12816/0049753.