Khalilak, Z., T. Vali, F. Danesh, and M. Vatanpour. “The Effect of One-Step or Two-Step MTA Plug and Tooth Apical Width on Coronal Leakage in Open Apex Teeth”. Iranian Endodontic Journal, vol. 7, no. 1, Dec. 2011, pp. 10-14, doi:10.22037/iej.v7i1.2725.