Kadhom, T. H., & Al-Hashimi, W. N. (2013). A study to compare the efficiency of different instrumentation systems for cleaning oval-shaped root canals (An in vitro study). Journal of Baghdad College of Dentistry, 25(1), 49-55. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/138