Fonseca, Alice de Morais Veras, et al. “Photodynamic Therapy With Propolis: Antibacterial Effects on Staphylococcus Aureus, Streptococcus Mutans and Escherichia Coli Analysed by Atomic Force Microscopy: Photodynamic Therapy With Propolis”. Journal of Lasers in Medical Sciences, vol. 11, no. Supplement, Dec. 2020, pp. S107-S112, https://journals.sbmu.ac.ir/jlms/article/view/29289.