Beyraghshamshir, Reza, Mina Zarei, and Salehe Sekandari. “A Mandibular First Molar With Three Distal Canals: A Case Report and Literature Review”. Iranian Endodontic Journal 14, no. 3 (July 23, 2019): 216–219. Accessed April 19, 2024. https://journals.sbmu.ac.ir/iej/article/view/24400.