Rahimi, Saeed, and Negin Ghasemi. “Maxillary First Molar With Two Root Canals”. Sultan Qaboos University Medical Journal 13, no. 2 (May 1, 2013): 346–349. Accessed May 3, 2024. https://journals.squ.edu.om/index.php/squmj/article/view/1798.