A. Ashraf, W. Hussein, A. Hashem, and A. Soliman, “The Effect of Passive Ultrasonic Irrigation and XP-Endo Finisher on Post-operative Pain after Endodontic Retreatment on Patients (Randomized Controlled Clinical Trial)”, Open Access Maced J Med Sci, vol. 10, no. D, pp. 450–457, Oct. 2022.