“AN ENDODONTIC TREATMENT OF A SECOND UPPER MOLAR WITH FOURFOLD ROOT: A CASE REPORT”, Rev. nac. odontol., vol. 7, no. 12, pp. 63–67, Jan. 2014, Accessed: Jul. 06, 2026. Available: https://revistas.ucc.edu.co/index.php/od/article/view/301