C. H. Jonker, P. J. van der Vyver, and A. C. Oettlé, “Root and canal morphology of the mandibular first molar: A micro-computed tomography-focused observation of literature with illustrative cases. Part 1: External root morphology”, S. Afr. dent. j., vol. 78, no. 09, pp. 449–456, Dec. 2023.