Anauate-Netto, Camilo, et al. “Randomized, Double-Masked, Placebo-Controlled Clinical Trial on the Effects of Propolis and Chlorhexidine Mouthrinses on Gingivitis”. Brazilian Dental Science, vol. 17, no. 1, Jan. 2014, pp. 11-15, doi:10.14295/bds.2014.v17i1.947.