Pérez Morales MLN, González Sánchez JA, Olivieri JG, Elmsmari F, Salmon P, Jaramillo DE, Terol FD. Micro-computed Tomographic Assessment and Comparative Study of the Shaping Ability of 6 Nickel-Titanium Files: An In Vitro Study. J Endod. 2021 May;47(5):812-819. doi: 10.1016/j.joen.2020.12.021. Epub 2021 Feb 4. PMID: 33549630.