Hassan, Shatha, and Tahani Al–Sandook. “Salivary Calcium Concentration in Patients With High Incidence of Calculus Formation”. Al-Rafidain Dental Journal 5, no. 1 (January 1, 2005): 88–90. Accessed January 12, 2026. https://rden.uomosul.edu.iq/index.php/rden/article/view/35510.