T. R. Costa, C. A. Yamaguchi, A. P. M. Galhardo, R. C. Stegun, B. Costa, and M. K. Mukai, “Maxillary removable partial denture combined with O’ring attachment implant: a case report”, Clin Lab Res Dent, Mar. 2018, doi: 10.11606/issn.2357-8041.clrd.2017.129422.