Nagi, Sana Ehsen, and Farhan Raza Khan. “COMPARISON OF PRE-OPERATIVE CURVATURE WITH POST-OPERATIVE CURVATURE IN ROOT CANALS TREATED WITH K-3 ROTARY SYSTEMS”. Journal of Ayub Medical College Abbottabad, vol. 29, no. 2, Apr. 2017, pp. 190-3, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/534.