Fava, C.D. et al. 2010. Occurrence of seropositive sheep (Ovis aries) to Bovine Leukemia Virus in Brazil. Brazilian Journal of Veterinary Research and Animal Science. 47, 6 (Dec. 2010), 483–487. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.2010.26811.