Farahi, F., E. Saberi, and S. Bijari. “Residual Dentin Thickness at the Apical Third of Mandibular First Molar Mesial Root Instrumented by Nickel-Titanium Rotary and Manual Files With Different Tapers”. Giornale Italiano Di Endodonzia, vol. 35, Mar. 2022, doi:10.32067/GIE.2021.35.02.45.