Figueroa, J., Martínez, P. and Moreno, Z. (2007) “Antimicrobial Effect in Vitro of Argentineans Colombians and Cuban Propolis On Streptococcus Mutans Atcc 25175”, NOVA Biomedical Sciences Journal, 5(7), pp. 70–75. doi:10.22490/24629448.376.