Khan, I. ullah, & Sobhi, M. B. (2003). DETECTING THE APICAL CONSTRICTION IN CURVED MANDIBULAR MOLAR ROOTS--- PREFLARED VERSUS NONFLARED CANALS. Journal of Ayub Medical College Abbottabad, 15(3). Retrieved from https://www.jamc.ayubmed.edu.pk/index.php/jamc/article/view/3978