Knop, Luegya Amorim Henriques, et al. “Characterization of Surface Topography and Chemical Composition of Mini-Implants”. Brazilian Journal of Oral Sciences, vol. 14, no. 3, Jan. 2015, pp. 251-5, https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642881.