Helmi, Mustafa, and Hajer Ibrahem. “Effect of Lactobacillus Species on the Expression of Gene Related to Biofilm Formation by Streptococcus Mutans: doi.org 10.26538 Tjnpr V5i3.5”. Tropical Journal of Natural Product Research (TJNPR), vol. 5, no. 3, Mar. 2021, pp. 445-7, https://www.tjnpr.org/index.php/home/article/view/696.