Jonker, C. H., van der Vyver, P. J., & Oettlé, A. C. (2023). 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. South African Dental Journal, 78(09), 449-456. https://doi.org/10.17159/sadj.v78i09.16861