Kamil Zafar, et al. “COMPARISON OF CENTERING ABILITY AND TRANSPORTATION OF THE PROTAPER NEXT AND ONESHAPE FILE ROTARY SYSTEMS FOR PREPARING SIMULATED CURVED CANAL”. Journal of Ayub Medical College Abbottabad, vol. 33, no. 2, Apr. 2021, pp. 202-6, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/7337.