Fehr Al-Basrawi, R., and F. azher Al-Mashhadane. “Antioxidant Effect of Folic Acid and Its Relation to Salivary Proteins and Oral Health”. Al-Rafidain Dental Journal, vol. 20, no. 1, June 2020, pp. 83-94, doi:10.33899/rden.2020.164540.