Ferreira, Lílian, Paula Finger, Clarissa Castro, Bianca Siedler, Lívia Munhoz, Gilberto Vargas, Geferson Fischer, and Silvia Hübner. “Effect of the Ethanolic Extract from Green Propolis on Production of Antibodies After Immunization Against Canine Parvovirus (CPV) and Canine Coronavirus (CCoV)”. Brazilian Journal of Veterinary Research and Animal Science 49, no. 2 (April 3, 2012): 116-121. Accessed September 25, 2020. http://www.revistas.usp.br/bjvras/article/view/40267.