Hassan S, Al–Sandook T. Salivary calcium concentration in patients with high incidence of calculus formation. Al-Rafidain Dent J [Internet]. 2005 Jan. 1 [cited 2026 Jan. 12];5(1):88-90. Available from: https://rden.uomosul.edu.iq/index.php/rden/article/view/35510