D. Syafriza, H. Sutadi, A. Primasari, and Y. Siregar, “Spectrophotometric Analysis of Streptococcus mutans Growth and Biofilm Formation in Saliva and Histatin-5 Relate to pH and Viscosity”, Pesqui Bras Odontopediatria Clin Integr, vol. 21, p. e0018, Nov. 2021.