Adl, A., S. Sahebi, M. Niknam, and M. Niknam. “Comparison of Apical Debris Extrusion Using a Conventional and Two Rotary Techniques”. Iranian Endodontic Journal, vol. 4, no. 4, Feb. 2010, pp. 135-8, doi:10.22037/iej.v4i4.1488.