Yırgın Akgül, Nazan, et al. “Evaluation of Apical Extrusion of Debris During Retreatment: R-Endo Rotary Instruments Versus Hand Files”. International Dental Research, vol. 12, no. 2, Aug. 2022, pp. 82-87, https://doi.org/10.5577/intdentres.2022.vol12.no2.6.