A MOHAMMED, R., and M. K AL-HASHIMI. “In Vitro Study to Compare the Sealing Ability of a Hydroxyapatite Endodontic Sealer With Other Sealers (Quantitative Measurement)”. Al-Rafidain Dental Journal, vol. 1, no. 3, Dec. 2001, pp. 247-56, doi:10.33899/rden.2020.166515.